- A1 between J7 / A602 and J8, Hertfordshire (Grid ref TL221261)
- A1 between J3 and J4, Hertfordshire (Grid ref TL224099)
- A1 between J5 and J6, Hertfordshire (Grid ref TL223140)
- A1 between A5135 and A1M, Hertfordshire (Grid ref TQ220990)
- A1 between J8 and J9, Hertfordshire (Grid ref TL230290)
- A1 between J2 and J3, Hertfordshire (Grid ref TL214065)
- A1 between A1000/B197 and J7 / A602, Hertfordshire (Grid ref TL243196)
- A1 between A1000 Hertford Road and A1000/B197, Hertfordshire (Grid ref TL235160)
- A1 between J1 and J2, Hertfordshire (Grid ref TL223050)
- A1 between J9 and Hertfordshire boundary, Hertfordshire (Grid ref TL239330)
- A1 between J4 and J5, Hertfordshire (Grid ref TL224120)
- A1 between A1M and M25, Hertfordshire (Grid ref TQ223998)
- A1 between A1 and M25, Hertfordshire (Grid ref TQ224999)
- A10 between A1170 and B158, Hertfordshire (Grid ref TL357170)
- A10 between A10 spur to A1170 and A414, Hertfordshire (Grid ref TL360124)
- A10 between Shrubbery Grove and Sun Hill, Hertfordshire (Grid ref TL357401)
- A10 between main A10 and A1170, Hertfordshire (Grid ref TL362048)
- A10 between A414 and A602, Hertfordshire (Grid ref TL344147)
- A10 between A1170 and A10 spur to A1170, Hertfordshire (Grid ref TL359045)
- A10 between A10 main route and A1170, Hertfordshire (Grid ref TL368114)
- A10 between Sun Hill and Melbourn Rd, Hertfordshire (Grid ref TL359406)
- A10 between A602 and A1170, Hertfordshire (Grid ref TL350156)
- A10 between A10 spur to A1170 Dinant Link Rd and A10 spur to A1170 Ware Rd, Hertfordshire (Grid ref TL364100)
- A10 between A121 and B198 College Rd, Hertfordshire (Grid ref TL353020)
- A10 between A120 and A507, Hertfordshire (Grid ref TL384250)
- A10 between A10 spur to A1170 High Rd Turnford and A10 spur to A1170 Dinant Link Rd, Hertfordshire (Grid ref TL359068)
- A10 between M25 and A121, Hertfordshire (Grid ref TL351004)
- A10 between A10 main route and A1170, Hertfordshire (Grid ref TL369090)
- A10 between B158 and A120, Hertfordshire (Grid ref TL364189)
- A10 between A10 main route and A10 spur/A1170 High Road Turnford, Hertfordshire (Grid ref TL360041)
- A10 between A507 and Shribbery Grove, Royston, Hertfordshire (Grid ref TL355330)
- A10 between Melbourn Rd, Royston and A505, Hertfordshire (Grid ref TL361420)
- A10 between B198 College Rd and A1170, Hertfordshire (Grid ref TL354030)
- A10 between A10(T) and A120, Hertfordshire (Grid ref TL373201)
- A1000 between A111 and B156, Hertfordshire (Grid ref TL260009)
- A1000 between A1000 split and A1M Jct 6/B656/B197, Hertfordshire (Grid ref TL234160)
- A1000 between inner ring road and inner ring road, Hertfordshire (Grid ref TL248135)
- A1000 between A1001 and A414W, Hertfordshire (Grid ref TL230080)
- A1000 between B195W and Ring Rd Jct S, Hertfordshire (Grid ref TL244133)
- A1000 between A6129 and B195 W, Hertfordshire (Grid ref TL240121)
- A1000 between A1000 Mill Green Lane and A6129, Hertfordshire (Grid ref TL240101)
- A1000 between LA boundary and Hill Rise, Potters Bar, Hertfordshire (Grid ref TL258000)
- A1000 between B156 and School Rd, Hertfordshire (Grid ref TL261020)
- A1000 between B158 and Dixons Hill Rd, Welham Green, Hertfordshire (Grid ref TL250055)
- A1000 between B157 and B158, Hertfordshire (Grid ref TL259041)
- A1000 between A1000 Mundells and A1000 Hertford Rd, Hertfordshire (Grid ref TL241150)
- A1000 between Ring Rd Jct S and Ring Rd Jct N, Hertfordshire (Grid ref TL248136)
- A1000 between A414 (midpoint) and A1000 Mill Green Lane, Hertfordshire (Grid ref TL239099)
- A1000 between Hill Rise and A111, Hertfordshire (Grid ref TL259007)
- A1000 between School Rd, Potters Bar and B157, Hertfordshire (Grid ref TL261030)
- A1000 between Dixons Hill Rd and A1001, Hertfordshire (Grid ref TL235064)
- A1000 between A1000 split and A1M/B197 S, Hertfordshire (Grid ref TL233157)
- A1000 between Bessemer Rd and A1000 split, Hertfordshire (Grid ref TL240154)
- A1001 between A1(M) and A1057, Hertfordshire (Grid ref TL212080)
- A1001 between A1(M) jn2 and A1(M) jn3, Hertfordshire (Grid ref TL214070)
- A1001 between A1(M) and A1000, Hertfordshire (Grid ref TL220062)
- A1001 between A1057 and A1M / A414 / A6129, Hertfordshire (Grid ref TL225100)
- A1005 between Hertfordshire boundary and M25, Hertfordshire (Grid ref TL268001)
- A1010 between Hertfordshire boundary and A121, Hertfordshire (Grid ref TL363002)
- A1057 between Lyon Way, St Albans and Poplar Avenue, Hatfield, Hertfordshire (Grid ref TL200078)
- A1057 between Poplar Avenue and A1001, Hertfordshire (Grid ref TL210082)
- A1057 between A1081/A4147 and Lyon Way, Hertfordshire (Grid ref TL160072)
- A1059 between B1259 and A1250, Hertfordshire (Grid ref TL490210)
- A1060 between B1383 and Bedlams Lane, Hertfordshire (Grid ref TL495204)
- A1060 between Bedlams Lane and Hertfordshire boundary, Hertfordshire (Grid ref TL495203)
- A1060 between A1250 and B1383, Hertfordshire (Grid ref TL493207)
- A1070 between A1072 and A602, Hertfordshire (Grid ref TL235236)
- A1072 between A602 and A1155, Hertfordshire (Grid ref TL249262)
- A1072 between A1070 and A1155, Hertfordshire (Grid ref TL229240)
- A1072 between A1155 and A602, Hertfordshire (Grid ref TL226250)
- A1072 between A602 and A1070, Hertfordshire (Grid ref TL236230)
- A1081 between Beesonend Lane, Harpenden and Sandridgebury Lane, St Albans, Hertfordshire (Grid ref TL143112)
- A1081 between A5183 and A4147, Hertfordshire (Grid ref TL148074)
- A1081 between B487 and B653, Hertfordshire (Grid ref TL136136)
- A1081 between M25 Jct 22 and A414, Hertfordshire (Grid ref TL185040)
- A1081 between LA boundary and M25, Hertfordshire (Grid ref TQ240976)
- A1081 between A4147 and B651, Hertfordshire (Grid ref TL150077)
- A1081 between A414 and A5183, Hertfordshire (Grid ref TL160061)
- A1081 between The Common, Harpenden and Hertfordshire boundary, Hertfordshire (Grid ref TL100169)
- A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032)
- A1081 between Beesonend Lane and B487, Hertfordshire (Grid ref TL137125)
- A1081 between B653 and The Common, Hertfordshire (Grid ref TL129150)
- A1081 between Sandridgebury Lane and B651 Stonecross, Hertfordshire (Grid ref TL150084)
- A111 between Hill Rise and A1000, Hertfordshire (Grid ref TL262006)
- A111 between Hertfordshire boundary and M25, Hertfordshire (Grid ref TQ267998)
- A111 between M25 and Hill Rise, Hertfordshire (Grid ref TL263004)
- A1155 between A1155 Fairlands Way and A602, Hertfordshire (Grid ref TL240240)
- A1155 between A1072 and A602, Hertfordshire (Grid ref TL229242)
- A1155 between A1155 St George's Way and A1072, Hertfordshire (Grid ref TL242245)
- A1155 between A602 and A1155 St George's Way, Hertfordshire (Grid ref TL236244)
- A1170 between Quincey Rd, Hertford and A10, Hertfordshire (Grid ref TL354156)
- A1170 between St Margaret's Rd and A10, Hertfordshire (Grid ref TL371112)
- A1170 between A10 and Postwood Rd, Hertford, Hertfordshire (Grid ref TL369120)
- A1170 between A119 and A119, Hertfordshire (Grid ref TL361138)
- A1170 between A119 and B1004, Hertfordshire (Grid ref TL356144)
- A1170 between A10 and A10, Hertfordshire (Grid ref TL376090)
- A1170 between B156 Halfhide Lane and A10 spur, Hertfordshire (Grid ref TL362044)
- A1170 between Postwood Rd and A119, Hertfordshire (Grid ref TL362135)
- A1170 between B1004 and Quincey Rd, Hertfordshire (Grid ref TL355150)
- A1170 between A10 and St Margaret's Rd, Hertfordshire (Grid ref TL371100)
- A1170 between B156 and A10, Hertfordshire (Grid ref TL361042)
- A1184 between Hertfordshire boundary and Station Rd, Sawbridgeworth, Hertfordshire (Grid ref TL477142)
- A1184 between Station Rd, Sawbridgeworth and B1383, Hertfordshire (Grid ref TL483156)
- A1184 between Moor Hall Lane and B1004, Hertfordshire (Grid ref TL468200)
- A1184 between B1383 and Moor Hall Lane, Hertfordshire (Grid ref TL480188)
- A1184 between B1004 and A120/1250, Hertfordshire (Grid ref TL468205)
- A119 between A602 and Bramfield Rd, Hertford, Hertfordshire (Grid ref TL311150)
- A119 between A414 and A119 Amwell End, Hertfordshire (Grid ref TL353139)
- A119 between A119 Amwell End and A1170, Hertfordshire (Grid ref TL360139)
- A119 between A119 and A1170, Hertfordshire (Grid ref TL359140)
- A119 between Bramfield Rd and A414, Hertfordshire (Grid ref TL318127)
- A120 between A10(T) and A1184 / A250, Hertfordshire (Grid ref TL450224)
- A120 between A1184 / A250 and Hertfordshire boundary, Hertfordshire (Grid ref TL480230)
- A121 between A121 / A1010 and Hertfordshire boundary, Hertfordshire (Grid ref TL374005)
- A121 between B176 and A10, Hertfordshire (Grid ref TL355008)
- A121 between A1010 and B176, Hertfordshire (Grid ref TL362004)
- A1250 between A120 / A1184 and A1059, Hertfordshire (Grid ref TL480216)
- A1250 between A1060 and Parsonage Lane, Hertfordshire (Grid ref TL500211)
- A1250 between A1060 and A1059, Hertfordshire (Grid ref TL492212)
- A1250 between Parsonage Lane and Hertfordshire boundary, Hertfordshire (Grid ref TL507215)
- A4008 between Hertfordshire boundary and A4008 split, Hertfordshire (Grid ref TQ120948)
- A4008 between A4008 split and A411/A4125, Hertfordshire (Grid ref TQ119953)
- A4008 between A4008 split and A411/B462, Hertfordshire (Grid ref TQ120953)
- A4008 between A411 and A41/M1 roundabout, Hertfordshire (Grid ref TQ118970)
- A404 between A4145 and Hertfordshire boundary, Hertfordshire (Grid ref TQ070928)
- A404 between M25 and A412, Hertfordshire (Grid ref TQ050958)
- A404 between A412 and A4145, Hertfordshire (Grid ref TQ060940)
- A404 between road from North Hill, Chorleywood and M25, Hertfordshire (Grid ref TQ033967)
- A404 between Hertfordshire boundary and road from North Hill, Hertfordshire (Grid ref TQ026975)
- A405 between M1 and M25, Hertfordshire (Grid ref TL119022)
- A405 between A41 and A412, Hertfordshire (Grid ref TL110004)
- A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039)
- A405 between A412 and M1, Hertfordshire (Grid ref TL117010)
- A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046)
- A409 between Hertfordshire boundary and A411, Hertfordshire (Grid ref TQ156945)
- A41 between B462 and A4008 / M25 J5, Hertfordshire (Grid ref TQ131978)
- A41 between M25 JCT 20 and A414, Hertfordshire (Grid ref TL058031)
- A41 between A411 / M25 J19 SPUR and A405, Hertfordshire (Grid ref TQ090995)
- A41 between A4251 and B488/B4635, Hertfordshire (Grid ref SP926108)
- A41 between Woodmere Ave and A412, Hertfordshire (Grid ref TQ120989)
- A41 between A417 / M25 JCT 19 SPUR and M25 JCT 20, Hertfordshire (Grid ref TL083000)
- A41 between A414 and A4251W, Hertfordshire (Grid ref TL030061)
- A41 between A412 and A405, Hertfordshire (Grid ref TQ100995)
- A41 between A4251 W and A416, Hertfordshire (Grid ref TL003063)
- A41 between A5183 / A5 and A411, Hertfordshire (Grid ref TQ164950)
- A41 between A411 and B462, Hertfordshire (Grid ref TQ150959)
- A41 between A416 and A416, Hertfordshire (Grid ref SP986066)
- A41 between B488/B4635 and Hertfordshire boundary, Hertfordshire (Grid ref SP905112)
- A41 between Hertfordshire boundary and A5183, Hertfordshire (Grid ref TQ175944)
- A41 between A4008 / M25 J5 and Woodmere Ave, Hertfordshire (Grid ref TQ125984)
- A41 between A416 and A4251, Hertfordshire (Grid ref SP970076)
- A41 between LA Boundary Buckinghamshire County and B4009, Hertfordshire (Grid ref SP905112)
- A41, Hertfordshire (Grid ref TQ090995)
- A41, Hertfordshire (Grid ref TQ094996)
- A41, Hertfordshire (Grid ref TQ092996)
- A41, Hertfordshire (Grid ref TQ095996)
- A41, Abbots Langley, Hertfordshire (Grid ref TQ094999)
- A411 between A4140 and A409, Hertfordshire (Grid ref TQ150946)
- A411 between Upton Rd and A411 Beechen Grove, Hertfordshire (Grid ref TQ108966)
- A411 between A5183 and A1(T), Hertfordshire (Grid ref TQ200954)
- A411 between Courtlands Drive and A412, Hertfordshire (Grid ref TQ100976)
- A411 between A4145 and A411 Beechen Grove split, Hertfordshire (Grid ref TQ111960)
- A411 between A4008 and A4008, Hertfordshire (Grid ref TQ119954)
- A411 between A409 and A41(T), Hertfordshire (Grid ref TQ160950)
- A411 between A412 and A411 Exchange Rd, Hertfordshire (Grid ref TQ108968)
- A411 between A411 Beechen Grove split and A4008, Hertfordshire (Grid ref TQ115962)
- A411 between A41(T) and A5183, Hertfordshire (Grid ref TQ170951)
- A411 between Upton Rd and A4145, Hertfordshire (Grid ref TQ108963)
- A411 between Beechen Grove split and A411 Exchange Rd, Hertfordshire (Grid ref TQ109966)
- A411 between A4008 and A4140, Hertfordshire (Grid ref TQ130953)
- A411 between M25 and Courtlands Drive, Hertfordshire (Grid ref TQ088990)
- A411 between A4008 and A4008, Hertfordshire (Grid ref TQ117963)
- A411 between A4008 and A4008, Hertfordshire (Grid ref TQ117963)
- A412 between Long Lane and A404, Hertfordshire (Grid ref TQ050941)
- A412 between A411 and A41(T), Hertfordshire (Grid ref TQ108975)
- A412 between A404 Riverside Drive and A404 Chorleywoood Rd, Hertfordshire (Grid ref TQ056946)
- A412 between A404 and A4178, Hertfordshire (Grid ref TQ060947)
- A412 between A412 Uxbridge Rd and M25, Hertfordshire (Grid ref TQ033939)
- A412 between A41(T) and A405(T), Hertfordshire (Grid ref TL114000)
- A412 between A4178 and A411, Hertfordshire (Grid ref TQ105967)
- A412 between Hertfordshire boundary and A412 split, Hertfordshire (Grid ref TQ030917)
- A412 between A412 Denham Way and Long Lane, Hertfordshire (Grid ref TQ039935)
- A4125 between A4178 and A411/A4008, Hertfordshire (Grid ref TQ115952)
- A4125 between B4542 and A411, Hertfordshire (Grid ref TQ100939)
- A4125 between Hertfordshire boundary and B4542, Hertfordshire (Grid ref TQ102920)
- A414 between B1197 London Rd and A10, Hertfordshire (Grid ref TL340124)
- A414 between A4251 and A4146, Hertfordshire (Grid ref TL054060)
- A414 between A1170 and Eastwick Rd roundabout, Hertfordshire (Grid ref TL433114)
- A414 between A1081 and A1(M), Hertfordshire (Grid ref TL203067)
- A414 between A4147 and M1, Hertfordshire (Grid ref TL088075)
- A414 between A1M / A1001 / A6129 and A1000 (midpoint), Hertfordshire (Grid ref TL229102)
- A414 between A4146 and A4147, Hertfordshire (Grid ref TL060066)
- A414 between A119 Cross Lane and A119 Ware Rd, Hertfordshire (Grid ref TL323124)
- A414 between M10 and A1081, Hertfordshire (Grid ref TL150048)
- A414 between A1000 Mill Green Lane and B1455 Holwell Lane, Hertfordshire (Grid ref TL249100)
- A414 between Eastwick Rd roundabout and Hertfordshire boundary, Hertfordshire (Grid ref TL442116)
- A414 between A1000 (midpoint) and A1000 Mill Green Lane, Hertfordshire (Grid ref TL240097)
- A414 between Campfield Rd and A119, Hertfordshire (Grid ref TL318124)
- A414 between A119 and B1197 London Rd/John Tate Rd roundabout, Hertfordshire (Grid ref TL333124)
- A414 between A41 and A4251, Hertfordshire (Grid ref TL052054)
- A414 between B1455 and Campfield Rd, Hertford, Hertfordshire (Grid ref TL300119)
- A414 between A1170 and Eastwick Rd roundabout, Hertfordshire (Grid ref TL433114)
- A414 between A414 and M1 (8), Hertfordshire (Grid ref TL091076)
- A414 between M1 Junction 7 and Roundabout A414, A5183 and A405, Hertfordshire (Grid ref TL142051)
- A414 between J7 and J8, Hertfordshire (Grid ref TL095071)
- A4140 between A409 and A411, Hertfordshire (Grid ref TQ150940)
- A4145 between Chenies Way and A4178 roundabout, Hertfordshire (Grid ref TQ100957)
- A4145 between A4178 roundabout and A411, Hertfordshire (Grid ref TQ108961)
- A4145 between A404 and Chenies Way, Watford, Hertfordshire (Grid ref TQ077940)
- A4146 between A414 and Gadebridge Lane, Hertfordshire (Grid ref TL053070)
- A4146 between A4147 and LA boundary, Hertfordshire (Grid ref TL033109)
- A4146 between Gadebridge Lane and A4147, Hertfordshire (Grid ref TL050084)
- A4146 between A4251 and A414, Hertfordshire (Grid ref TL050061)
- A4146 between Warners End Road and A4147, Hertfordshire (Grid ref TL050084)
- A4146 between A414 and Warners End Road, Hertfordshire (Grid ref TL053070)
- A4147 between King Harry Lane roundabout and A5183, Hertfordshire (Grid ref TL132070)
- A4147 between A4146 and Aycliffe Drive, Hemel Hempstead, Hertfordshire (Grid ref TL060088)
- A4147 between A5183 and A1081, Hertfordshire (Grid ref TL141077)
- A4147 between B487 and A414, Hertfordshire (Grid ref TL078080)
- A4147 between Greenacres, Hemel Hempstead and King Harry Lane roundabout, Hertfordshire (Grid ref TL100060)
- A4147 between A414 and Greenacres, Hertfordshire (Grid ref TL081067)
- A4147 between Aycliffe Drive and B487, Hertfordshire (Grid ref TL068090)
- A416 between A416 split Kingshll Way Rndbt and A4251, Hertfordshire (Grid ref SP985072)
- A416 between Hertfordshire boundary and A416 split, Hertfordshire (Grid ref SP982063)
- A416 between A416 Chesham Road and A416 Kingshill Way, Hertfordshire (Grid ref SP985065)
- A416 between A416 Chesham Road and A41, Hertfordshire (Grid ref SP984065)
- A416 between A416 Kingshill Way and A41, Hertfordshire (Grid ref SP988067)
- A4178 between A4125 and A4145 roundabout, Hertfordshire (Grid ref TQ110958)
- A4178 between A411 and A412, Hertfordshire (Grid ref TQ105965)
- A4178 between A4145 and A411, Hertfordshire (Grid ref TQ106963)
- A4251 between A4146 and A414, Hertfordshire (Grid ref TL050058)
- A4251 between A414 and Nash Mills Lane, Hertfordshire (Grid ref TL061050)
- A4251 between Hall Park Gate, Berkhamstead and A41, Hertfordshire (Grid ref TL008068)
- A4251 between A41 and B4505, Hertfordshire (Grid ref TL034059)
- A4251 between B4506 and A416, Hertfordshire (Grid ref SP980084)
- A4251 between A41 / B4635 and Boswick Lane, Berkhamstead, Hertfordshire (Grid ref SP961100)
- A4251 between B4505 and A4146, Hertfordshire (Grid ref TL045060)
- A4251 between A416 and Hall Park Gate, Hertfordshire (Grid ref SP997075)
- A4251 between Boswick Lane and B4506, Hertfordshire (Grid ref SP970091)
- A4251 between Nash Mills Lane, Hemel Hempstead and Home Park Mill Link Rd, Kings Langley, Hertfordshire (Grid ref TL074020)
- A4251 between Home Park Mill Link Rd, Kings Langley and M25 Jn20, Hertfordshire (Grid ref TL075017)
- A5 between B4540 and M1 jn9, Hertfordshire (Grid ref TL086150)
- A5 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL092146)
- A5 between A4012 and A505, Hertfordshire (Grid ref TL064163)
- A5 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL091146)
- A505 between A6141 and A6141, Hertfordshire (Grid ref TL239335)
- A505 between B656 and Stotwold Rd/Queenswood Drive, Hertfordshire (Grid ref TL200302)
- A505 between A600 and B656, Hertfordshire (Grid ref TL190297)
- A505 between A1198 and A10, Hertfordshire (Grid ref TL360424)
- A505 between A6141 and A507, Hertfordshire (Grid ref TL245340)
- A505 between B655 and A602, Hertfordshire (Grid ref TL180290)
- A505 between Stotwold Rd/Queenswood Drive and A6141, Hertfordshire (Grid ref TL223320)
- A505 between Hertfordshire boundary and B655, Hertfordshire (Grid ref TL165284)
- A505 between Baldock Rd roundabout and A1198, Hertfordshire (Grid ref TL350420)
- A505 between A505 Old Park Rd and A600, Hertfordshire (Grid ref TL180295)
- A505 between A507 and Baldock Rd (non-A505), Hertfordshire (Grid ref TL327400)
- A505 between A602 and Old Park Rd, Hertfordshire (Grid ref TL182293)
- A505 between A602 and Bedford Rd, Hertfordshire (Grid ref TL181293)
- A505 between A10 and Hertfordshire boundary, Hertfordshire (Grid ref TL370412)
- A505 between A1(M) and Baldock Roundabout, Hertfordshire (Grid ref TL241312)
- A507 between Wallington Rd, Baldock and A10, Hertfordshire (Grid ref TL299305)
- A507 between A1(M) and Salisbury Rd, Baldock, Hertfordshire (Grid ref TL241348)
- A507 between A505 and Wallington Rd, Hertfordshire (Grid ref TL250336)
- A507 between Salisbury Rd and A505, Hertfordshire (Grid ref TL245342)
- A5135 between B5378 and Newark Green roundabout, Hertfordshire (Grid ref TQ200970)
- A5183 between B487 and A5, Hertfordshire (Grid ref TL100137)
- A5183 between M10 and A1081, Hertfordshire (Grid ref TL142056)
- A5183 between A4147 and B487, Hertfordshire (Grid ref TL118101)
- A5183 between A41 and A411, Hertfordshire (Grid ref TQ176950)
- A5183 between A4147 and A4147, Hertfordshire (Grid ref TL139077)
- A5183 between A411 and Park Street Lane, St Albans, Hertfordshire (Grid ref TL163000)
- A5183 between A1081 and A4147, Hertfordshire (Grid ref TL143075)
- A5183 between B487 and B487, Hertfordshire (Grid ref TL110119)
- A5183 between Park Street Lane and M10, Hertfordshire (Grid ref TL146045)
- A600 between Turnpike Lane, Hitchin and Hertfordshire boundary, Hertfordshire (Grid ref TL170346)
- A600 between A505 and Turnpike Lane, Hertfordshire (Grid ref TL178305)
- A602 between A1070 and A1155, Hertfordshire (Grid ref TL239238)
- A602 between Whitehill Rd, Hitchin and A1(M), Hertfordshire (Grid ref TL200278)
- A602 between A1(M) and A1072, Hertfordshire (Grid ref TL237225)
- A602 between A505 and B656, Hertfordshire (Grid ref TL181286)
- A602 between A602 split and A1155, Hertfordshire (Grid ref TL232250)
- A602 between A1155 and A1070, Hertfordshire (Grid ref TL235240)
- A602 between Hertford Rd, Stevenage and A119, Hertfordshire (Grid ref TL291200)
- A602 between A1155 and B197, Hertfordshire (Grid ref TL242230)
- A602 between A119 and A10, Hertfordshire (Grid ref TL320192)
- A602 between A1072 and A602 Monkswood Way, Hertfordshire (Grid ref TL240227)
- A602 between Coreys Mill Lane and A1072, Hertfordshire (Grid ref TL230261)
- A602 between A602 merge and A602 split, Hertfordshire (Grid ref TL231254)
- A602 between A602 merge and A602 split, Hertfordshire (Grid ref TL232255)
- A602 between A1072 and A602 split, Hertfordshire (Grid ref TL231257)
- A602 between B656 and Whitehill Rd, Hertfordshire (Grid ref TL190282)
- A602 between B197 and Hertford Rd, Hertfordshire (Grid ref TL257226)
- A602 between A1(M) and Coreys Mill Lane, Hertfordshire (Grid ref TL226267)
- A6129 between B197 and A1000, Hertfordshire (Grid ref TL235120)
- A6129 between A1M / A1001 / A414 and B197, Hertfordshire (Grid ref TL227110)
- A6141 between A1(M) and Baldock Lane, Hertfordshire (Grid ref TL234310)
- A6141 between A1(M) and Weston Way, Hertfordshire (Grid ref TL237308)
- A6141 between Baldock Lane and A505, Hertfordshire (Grid ref TL228320)
- A6141 between A505 and Weston Way, Hertfordshire (Grid ref TL247330)
- B1000, Welwyn Road, Hertfordshire (Grid ref TL315128)
- B1004, Hadham Road, Hertfordshire (Grid ref TL453199)
- B1004, Hertfordshire (Grid ref TL423166)
- B1037, White Hill, Hertfordshire (Grid ref TL295279)
- B1037, Stevenage Road, Hertfordshire (Grid ref TL286259)
- B1037, Hertfordshire (Grid ref TL301285)
- B1038, Conduit Lane, Hertfordshire (Grid ref TL415303)
- B1038, Baldock Road, Hertfordshire (Grid ref TL357294)
- B1039, N/a, Hertfordshire (Grid ref TL383396)
- B1368, Hare Street B1368, Hertfordshire (Grid ref TL391315)
- B1368, High Street, Hertfordshire (Grid ref TL384357)
- B1368, Hertfordshire (Grid ref TL392249)
- B1368, Hay Street, Hertfordshire (Grid ref TL392267)
- B1502, Stanstead Road, Hertfordshire (Grid ref TL360122)
- B1502, Stanstead Road, Hertfordshire (Grid ref TL365117)
- B158, Bengeo Street, Hertfordshire (Grid ref TL323134)
- B158, Cumcum Hill, Hertfordshire (Grid ref TL271069)
- B158, Lower Hatfield Road, Hertfordshire (Grid ref TL298095)
- B158, High Road, Hertfordshire (Grid ref TL274083)
- B176, High Road Turnford, Hertfordshire (Grid ref TL365043)
- B195, Bridge Road, Hertfordshire (Grid ref TL239131)
- B195, Welwyn Garden City, Hertfordshire (Grid ref TL252131)
- B195, Black Fan Road, Hertfordshire (Grid ref TL262120)
- B197, London Road, Hertfordshire (Grid ref TL252199)
- B197, Great North Road, Hertfordshire (Grid ref TL223116)
- B197, London Road, Hertfordshire (Grid ref TL253186)
- B197, London Road, Hertfordshire (Grid ref TL243223)
- B197, London Road, Hertfordshire (Grid ref TL241226)
- B198, Lieutenant Ellis Way, Hertfordshire (Grid ref TL342014)
- B462, Aldenham Road, Hertfordshire (Grid ref TQ126964)
- B487, Hertfordshire (Grid ref TL102115)
- B5378, Cowley Hill, Hertfordshire (Grid ref TQ197982)
- B556, Harper Lane, Hertfordshire (Grid ref TL174023)
- B556, Bell Lane, Hertfordshire (Grid ref TL181027)
- B6426, Cavendish Way, Hertfordshire (Grid ref TL221084)
- B651, Hertfordshire (Grid ref TL194225)
- B651, Hertfordshire (Grid ref TL176194)
- B651, Hitchin Road, Hertfordshire (Grid ref TL188209)
- B652, Station Road, Hertfordshire (Grid ref TL143147)
- B653, Hertfordshire (Grid ref TL203132)
- B655, Hexton Road, Hertfordshire (Grid ref TL145299)
- B655, Barton Road, Hertfordshire (Grid ref TL112301)
- B656, Church Street, Hertfordshire (Grid ref TL233164)
- B656, London Road, Hertfordshire (Grid ref TL194267)
- C, Nettleden Road, Hertfordshire (Grid ref TL013107)
- C, Mundew Road, Hertfordshire (Grid ref TL332213)
- C, Clarence Road, Hertfordshire (Grid ref TL130150)
- C, Dundale Road, Hertfordshire (Grid ref SP920120)
- C, Tring Road, Hertfordshire (Grid ref SP887165)
- C, Ashwell Road, Hertfordshire (Grid ref TL256349)
- C, London Road, Hertfordshire (Grid ref TQ194999)
- C, Aldenham Road, Hertfordshire (Grid ref TQ165965)
- C, Codicote Road, Hertfordshire (Grid ref TL208161)
- C, Marshalswick Lane, Hertfordshire (Grid ref TL168082)
- C, Nettleden Road, Hertfordshire (Grid ref TL031101)
- C, Cold Green, Hertfordshire (Grid ref TL283112)
- C, Cow Lane, Hertfordshire (Grid ref SP938115)
- C, Blindman's Lane, Hertfordshire (Grid ref TL356025)
- C, Peascroft Road, Hertfordshire (Grid ref TL074061)
- C, Hertfordshire (Grid ref TL143208)
- C, Beaconsfield Road, Hertfordshire (Grid ref TL231089)
- C, Waterdell Lane, Hertfordshire (Grid ref TL191269)
- C, Blue Bridge Road, Hertfordshire (Grid ref TL244033)
- C, Coursers Road, Hertfordshire (Grid ref TL201046)
- C, Sale Drive, Hertfordshire (Grid ref TL252342)
- C, Willian Road, Hertfordshire (Grid ref TL215304)
- C, Wood End Lane, Hertfordshire (Grid ref TL066136)
- C, Wilbury Road, Hertfordshire (Grid ref TL215336)
- C, Bell Lane, Hertfordshire (Grid ref TL365066)
- C, St Michaels Road, Hertfordshire (Grid ref TL200291)
- C, Hoddesdon Road, Hertfordshire (Grid ref TL380117)
- C, Knight Street, Hertfordshire (Grid ref TL483148)
- C, Frogmore Hill, Hertfordshire (Grid ref TL284214)
- C, Tom's Lane, Hertfordshire (Grid ref TL096035)
- C, Hertfordshire (Grid ref TL245305)
- C, Hollybush Lane, Hertfordshire (Grid ref TL131151)
- C, Wallington Road, Hertfordshire (Grid ref TL277342)
- C, Stansted Hill, Hertfordshire (Grid ref TL431184)
- C, Hertfordshire (Grid ref TL440278)
- C, Miswell Lane, Hertfordshire (Grid ref SP914116)
- C, Sheepcot Lane, Hertfordshire (Grid ref TQ111999)
- C, Redricks Lane, Hertfordshire (Grid ref TL459129)
- C, Radlett Road, Hertfordshire (Grid ref TQ117978)
- C, Station Road, Hertfordshire (Grid ref TL297192)
- C, N/a, Hertfordshire (Grid ref TL370216)
- C, Ashwell Rd, Hertfordshire (Grid ref TL267383)
- C, Burton Lane, Hertfordshire (Grid ref TL330033)
- C, Tring Ford Road, Hertfordshire (Grid ref SP922132)
- C, Buncefield Lane, Hertfordshire (Grid ref TL086076)
- C, Munden Road, Hertfordshire (Grid ref TL359242)
- C, Lower Road, Hertfordshire (Grid ref TQ026959)
- C, Limbrick Road, Hertfordshire (Grid ref TL141125)
- C, Munden Road, Hertfordshire (Grid ref TL347229)
- C, Roundwood Lane, Hertfordshire (Grid ref TL113149)
- C, Stag Lane, Hertfordshire (Grid ref TQ024952)
- C109, Willbury Hills Road, Hertfordshire (Grid ref TL202330)
- C127, Bennetts End Road, Hertfordshire (Grid ref TL069066)
- C132, Royal Oak Lane, Hertfordshire (Grid ref TL150320)
- C15, Albury Road, Hertfordshire (Grid ref TL439255)
- C16, Brickendon Lane, Hertfordshire (Grid ref TL327101)
- C174, Colney Heath Lane, Hertfordshire (Grid ref TL180069)
- C43, Stanstead Road, Hertfordshire (Grid ref TL377101)
- C70, Toms Hill Road, Hertfordshire (Grid ref SP967123)
- C74, Sarratt Road, Hertfordshire (Grid ref TQ051980)
- C77, Hill Farm Avenue, Hertfordshire (Grid ref TL101009)
- M1 between J5 and J6, Hertfordshire (Grid ref TL123002)
- M1 between J7 and J8, Hertfordshire (Grid ref TL097070)
- M1 between LA boundary and J5, Hertfordshire (Grid ref TQ147961)
- M1 between J9 and Hertfordshire boundary, Hertfordshire (Grid ref TL091153)
- M1 between J6A and J7, Hertfordshire (Grid ref TL112046)
- M1 between J8 and J9, Hertfordshire (Grid ref TL097105)
- M1 between J6 and J6A, Hertfordshire (Grid ref TL118024)
- M1 between A414 and M1 (8), Hertfordshire (Grid ref TL091076)
- M1 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL091146)
- M1 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL092146)
- M10 between M1(7) and J1, Hertfordshire (Grid ref TL142051)
- M25 between J23 and J22, Hertfordshire (Grid ref TL217011)
- M25 between J17 and J18, Hertfordshire (Grid ref TQ038950)
- M25 between J20 and J21, Hertfordshire (Grid ref TL100029)
- M25 between J18 and J19, Hertfordshire (Grid ref TQ050980)
- M25 between J21A and J21, Hertfordshire (Grid ref TL125031)
- M25 between J21A and J22, Hertfordshire (Grid ref TL162027)
- M25 between J23 and J24, Hertfordshire (Grid ref TL249000)
- M25 between J19 and J20, Hertfordshire (Grid ref TL074000)
- M25 between J19 and A41, Hertfordshire (Grid ref TQ080993)
- M25 between Hertfordshire boundary and J17, Hertfordshire (Grid ref TQ023929)
- M25 between J24 and Hertfordshire boundary, Hertfordshire (Grid ref TL269003)
- U, Sandfield Road, Hertfordshire (Grid ref TL162073)
- U, Barton Way, Hertfordshire (Grid ref TQ190972)
- U, Flaunden Lane, Hertfordshire (Grid ref TL023008)
- U, Astons Road, Hertfordshire (Grid ref TQ082925)
- U, Dukes Ride, Hertfordshire (Grid ref TL470215)
- U, Hertford Road, Hertfordshire (Grid ref TL261212)
- U, Little Bushy Lane, Hertfordshire (Grid ref TQ142964)
- U, The Ridgeway, Hertfordshire (Grid ref TL307134)
- U, Courtlands Drive, Hertfordshire (Grid ref TQ093990)
- U, Rowans, Hertfordshire (Grid ref TL253140)
- U, Danebridge Road, Hertfordshire (Grid ref TL437190)
- U, Mill Way, Hertfordshire (Grid ref TQ121973)
- U, Garston Lane, Hertfordshire (Grid ref TL120000)
- U, New Road, Hertfordshire (Grid ref TL371075)
- U, West Common Way, Hertfordshire (Grid ref TL134124)
- U, Tilehouse Street, Hertfordshire (Grid ref TL183289)
- U, Applecroft Road, Hertfordshire (Grid ref TL229125)
- U, Swanley Bar Lane, Hertfordshire (Grid ref TL261031)
- U, Woolners Way, Hertfordshire (Grid ref TL232247)
- U, Jessop Road, Hertfordshire (Grid ref TL250259)
- U, Moorlands, Hertfordshire (Grid ref TL252112)
- U, Hertfordshire (Grid ref TL257234)
- U, Bishop's Stortford, Hertfordshire (Grid ref TL478195)
- U, Homefield Road, Hertfordshire (Grid ref TQ132960)
- U, Tilehouse Street, Hertfordshire (Grid ref TL183289)
- U, Gallows Hill, Hertfordshire (Grid ref TL082014)
- U, Shepherd's Lane, Hertfordshire (Grid ref TQ038945)
- U, Baldwins Lane, Hertfordshire (Grid ref TQ077960)
- U, Tolmers Road, Hertfordshire (Grid ref TL305030)
- U, Eastern Way, Hertfordshire (Grid ref TL221339)
- U, Travellers Lane, Hertfordshire (Grid ref TL225069)
- U, Penn Way, Hertfordshire (Grid ref TL230311)
- U, Ridgeway, Hertfordshire (Grid ref TL254127)
- U, Hayling Road, Hertfordshire (Grid ref TQ104935)
- U, London Road, Hertfordshire (Grid ref TL367285)
- U, Sandringham Crescent, Hertfordshire (Grid ref TL175092)
- U, Gresley Way, Hertfordshire (Grid ref TL269255)
- U, Warners End Road, Hertfordshire (Grid ref TL045075)
- U, Broadwater Crescent, Hertfordshire (Grid ref TL248224)
- U, Villiers-sur-marne Avenue, Hertfordshire (Grid ref TL479203)
- U, Chace Avenue, Hertfordshire (Grid ref TL266013)
- U, King Harry Lane, Hertfordshire (Grid ref TL136064)
- U, Brook Road, Hertfordshire (Grid ref TL480143)
- U, Longfield Lane, Hertfordshire (Grid ref TL344035)
- U, Bridgewater Road, Hertfordshire (Grid ref SP988085)
- U, Station Road, Hertfordshire (Grid ref TL240042)
- U, Grove Road, Hertfordshire (Grid ref TL144133)
- U, High Street, Hertfordshire (Grid ref TL177043)
- U, Fairview Road, Hertfordshire (Grid ref TL230245)
- U, Six Hills Way, Hertfordshire (Grid ref TL246238)
- U, St Michaels Road, Hertfordshire (Grid ref TL196296)
- U, High Street, Hertfordshire (Grid ref TL013038)
- U, Fletcher Way, Hertfordshire (Grid ref TL063084)
- U, New Road, Hertfordshire (Grid ref TL360146)
- U, Trinity Lane, Hertfordshire (Grid ref TL360010)
- U, Burns Road, Hertfordshire (Grid ref TL354418)
- U, Bridge Street, Hertfordshire (Grid ref TL184288)
- U, Williams Way, Hertfordshire (Grid ref TQ169999)
- U, Faraday Road, Hertfordshire (Grid ref TL258245)
- U, Blackettswood Drive, Hertfordshire (Grid ref TQ019960)
- U, Mercers Avenue, Hertfordshire (Grid ref TL470199)
- U, Haggerston Road, Hertfordshire (Grid ref TQ183981)
- U, Jackman's Place, Hertfordshire (Grid ref TL228324)
- U, Quinn Way, Hertfordshire (Grid ref TL232322)
- U, Arlington Crescent, Hertfordshire (Grid ref TL361000)
- U, Beesonend Lane, Hertfordshire (Grid ref TL135118)
- U, The Carpenters, Hertfordshire (Grid ref TL470202)
- U, Steward Close, Hertfordshire (Grid ref TL362020)
- U, Stake Piece Road, Hertfordshire (Grid ref TL352403)
- U, Lauderdale Road, Hertfordshire (Grid ref TL084008)
- U, Uxbridge Road, Hertfordshire (Grid ref TQ050941)
- U, Ashdown Drive, Hertfordshire (Grid ref TQ185971)
- U, Chancellors Road, Hertfordshire (Grid ref TL234264)
- U, Landau Way, Hertfordshire (Grid ref TL367044)
- U, Windsor Way, Hertfordshire (Grid ref TQ044944)
- U, Newberries Avenue, Hertfordshire (Grid ref TQ171996)
- U, Oliver Rise, Hertfordshire (Grid ref TL064053)
- U, The Cloisters, Hertfordshire (Grid ref TQ061945)
- U, Highwoodhall Lane, Hertfordshire (Grid ref TL074047)
- U, Pacatian Way, Hertfordshire (Grid ref TL264258)
- U, Brookfield Gardens, Hertfordshire (Grid ref TL359036)
- U, Pindar Road, Hertfordshire (Grid ref TL384092)
- U, Deerswood Avenue, Hertfordshire (Grid ref TL227074)
- U, Himalayan Way, Hertfordshire (Grid ref TQ099954)
- U, Beechfield, Hertfordshire (Grid ref TL373107)
- U, Mornington, Hertfordshire (Grid ref TL252157)
- U, Pickford Hill, Hertfordshire (Grid ref TL147156)
- U, Batchwood Gardens, Hertfordshire (Grid ref TL149087)
- U, Northfield Road, Hertfordshire (Grid ref TL142157)
- U, Higgins Road, Hertfordshire (Grid ref TL329040)
- U, Coleridge Close, Hertfordshire (Grid ref TL197295)
- U, Turners Hill, Hertfordshire (Grid ref TL062070)
- U, Middle Way, Hertfordshire (Grid ref TQ105987)
- U, St James Road, Hertfordshire (Grid ref TQ108959)
- U, School Lane, Hertfordshire (Grid ref TL133010)
- U, Harcourt Road, Hertfordshire (Grid ref TQ140960)
- U, Reeds Crescent, Hertfordshire (Grid ref TQ112973)
- U, Dulwich Way, Hertfordshire (Grid ref TQ073959)
- U, Icknield Walk, Hertfordshire (Grid ref TL364412)
- U, Ellenborough Close, Hertfordshire (Grid ref TL477202)
- U, Durham Road, Hertfordshire (Grid ref TL251264)
- U, Hall Gardens, Hertfordshire (Grid ref TL209057)
- U, The Mount, Hertfordshire (Grid ref TQ053949)
- U, The Hedgerows, Hertfordshire (Grid ref TL266255)
- U, Honeycross Road, Hertfordshire (Grid ref TL032068)
- U, Stroma Close, Hertfordshire (Grid ref TL081060)
- U, Waterhouse Street, Hertfordshire (Grid ref TL054067)
- U, Station Approach, Hertfordshire (Grid ref TL365003)
- U, Redwood Rise, Hertfordshire (Grid ref TQ195985)
- U, St Michael's Street, Hertfordshire (Grid ref TL136073)
- U, Gladstone Road, Hertfordshire (Grid ref TL336216)
- U, Town Farm Crescent, Hertfordshire (Grid ref TL397225)
- U, Muirhead Way, Hertfordshire (Grid ref TL246200)
- U, Grange Road, Hertfordshire (Grid ref TQ126958)
- U, Nightingale Lane, Hertfordshire (Grid ref TL174050)
- U, Battlefield Road, Hertfordshire (Grid ref TL157082)
- U, St Vincent Drive, Hertfordshire (Grid ref TL165061)
- U, Dove Close, Hertfordshire (Grid ref TL482193)
- U, Ashridge Drive, Hertfordshire (Grid ref TQ113924)
- U, Moatfield Road, Hertfordshire (Grid ref TQ137957)
- U, Byron Close, Hertfordshire (Grid ref TL261254)
- U, Waytemore Road, Hertfordshire (Grid ref TL482206)
- U, Hobletts Road, Hertfordshire (Grid ref TL069078)
- U, Grange Road, Hertfordshire (Grid ref TL217338)
- U, Kenilworth Drive, Hertfordshire (Grid ref TQ203965)
- U, Spring View Road, Hertfordshire (Grid ref TL352137)
- U, Westfield Avenue, Hertfordshire (Grid ref TQ117982)
- U, Fallowfield, Hertfordshire (Grid ref TL247143)
- U, Concorde Drive, Hertfordshire (Grid ref TL059073)
- U, St Margarets, Hertfordshire (Grid ref TL246226)
- U, Rumsley, Hertfordshire (Grid ref TL342038)
- U, Fuller Gardens, Hertfordshire (Grid ref TQ107988)
- U, Thorley Lane, Hertfordshire (Grid ref TL485193)
- U, Grimstone Road, Hertfordshire (Grid ref TL212276)
- U, School Lane, Hertfordshire (Grid ref TL276086)
- U, Gun Road Gardens, Hertfordshire (Grid ref TL249196)
- U, Bernhardt Crescent, Hertfordshire (Grid ref TL261249)
- U, Hertfordshire (Grid ref TL249331)
- U, Twyford Bury Lane, Hertfordshire (Grid ref TL493196)
- U, Hertfordshire (Grid ref TL250254)
- U, Barbers Walk, Hertfordshire (Grid ref SP917111)
- U, Shenley Lane, Hertfordshire (Grid ref TL173037)
- U, Porters Hill, Hertfordshire (Grid ref TL143155)
- U, Dell Road, Hertfordshire (Grid ref TQ102988)
- U, Daniells, Hertfordshire (Grid ref TL252131)
- U, Denham Way, Hertfordshire (Grid ref TQ203978)
- U, Old Harpenden Road, Hertfordshire (Grid ref TL150088)
- U, Hazelbury Avenue, Hertfordshire (Grid ref TL084013)
- U, Sandringham Crescent, Hertfordshire (Grid ref TL171096)
- U, Parsonage Lane, Hertfordshire (Grid ref TL478166)
- U, Pickford Road, Hertfordshire (Grid ref TL059161)
- U, North Common Road, Hertfordshire (Grid ref TL101118)
- U, The Comyns, Hertfordshire (Grid ref TQ144943)
- U, The Paddocks, Hertfordshire (Grid ref TL257237)
- U, Maylands Road, Hertfordshire (Grid ref TQ112929)
- U, Caldwell Road, Hertfordshire (Grid ref TQ119926)
- U, Howardsgate, Hertfordshire (Grid ref TL236130)
- U, Park Road, Hertfordshire (Grid ref TL347145)
- U, The Fairway, Hertfordshire (Grid ref TQ092927)
- U, Cavendish Road, Hertfordshire (Grid ref TL058165)
- U, Mill Road, Hertfordshire (Grid ref TL329128)
- U, Park Road, Hertfordshire (Grid ref TQ103976)
- U, The Campions, Hertfordshire (Grid ref TQ190982)
- U, Hazelwood Lane, Hertfordshire (Grid ref TL085011)
- U, Newtown Road, Hertfordshire (Grid ref TL486209)
- U, Beaumont Avenue, Hertfordshire (Grid ref TL169074)