- A66 between A596 and Moor Rd, Cumbria (Grid ref NY010286)
- A66 between A596 and Stainburn Road, Cumbria (Grid ref NY010286)
- A66 between Stainburn Road and A595, Cumbria (Grid ref NY032285)
- A66 between Moor Rd and A595, Cumbria (Grid ref NY050291)
- A66 between A595 and A595, Cumbria (Grid ref NY080308)
- A66 between A595 and A5086, Cumbria (Grid ref NY110301)
- A66 between A5086 and B5289, Cumbria (Grid ref NY225260)
- A66 between B5289 and A591, Cumbria (Grid ref NY260245)
- A66 between A591 and A591, Cumbria (Grid ref NY280240)
- A66 between A591 and A5091, Cumbria (Grid ref NY300244)
- A66 between A5091 and A592, Cumbria (Grid ref NY400276)
- A66 between A592 and M6, Cumbria (Grid ref NY500285)
- A66 between M6 and A6, Cumbria (Grid ref NY516289)
- A66 between A6 and B6259, Cumbria (Grid ref NY578288)
- A66 between B6259 and A685, Cumbria (Grid ref NY790146)
- A66 between A685 and C road by Mount Pleasant Farm, Cumbria (Grid ref NY800144)
- A66 between C-road leading to B6276 (Mt Pleasant Farm) and Cumbria boundary, Cumbria (Grid ref NY850146)
- A66 between Durham boundary and A67, Durham (Grid ref NY900123)
- A66 between A67 and B6277, Durham (Grid ref NZ030137)
- A66 between B6277 and Durham boundary, Durham (Grid ref NZ070137)
- A66 between North Yorkshire boundary and A6136, North Yorkshire (Grid ref NZ200061)
- A66 between A1M and A66, North Yorkshire (Grid ref NZ250120)
- A66 between A66M and North Yorkshire boundary, North Yorkshire (Grid ref NZ269126)
- A66 between Darlington boundary and A167, Darlington (Grid ref NZ270125)
- A66 between A167 and A67, Darlington (Grid ref NZ300123)
- A66 between A67 and A66, Darlington (Grid ref NZ326150)
- A66 between A66 and BDY, Darlington (Grid ref NZ339164)
- A66 between Stockton-on-Tees boundary and A135, Stockton-on-Tees (Grid ref NZ399174)
- A66 between A135 and A135, Stockton-on-Tees (Grid ref NZ439175)
- A66 between A135 and A1045, Stockton-on-Tees (Grid ref NZ440176)
- A66 between A135 and A1045, Stockton-on-Tees (Grid ref NZ446178)
- A66 between A1045/A1130 and A1130, Stockton-on-Tees (Grid ref NZ453181)
- A66 between A1130 and A66 main carriageway, Stockton-on-Tees (Grid ref NZ458181)
- A66 between A1130 and end of non-DBFO, Stockton-on-Tees (Grid ref NZ461183)
- A66 between end of DBFO and A19, Middlesbrough (Grid ref NZ470187)
- A66 between end of DBFO and A19, Middlesbrough (Grid ref NZ476189)
- A66 between A19 and A1032, Middlesbrough (Grid ref NZ480191)
- A66 between A1032 and A178, Middlesbrough (Grid ref NZ485203)
- A66 between A66 and A172, Middlesbrough (Grid ref NZ496206)
- A66 between A172 and A66 split, Middlesbrough (Grid ref NZ502203)
- A66 between A66 split and A1085, Middlesbrough (Grid ref NZ507196)
- A66 between A66 split and A171, Middlesbrough (Grid ref NZ510201)
- A66 between A171 and Middlesbrough boundary, Middlesbrough (Grid ref NZ516203)
- A66 between Redcar and Cleveland boundary and A1053, Redcar and Cleveland (Grid ref NZ530208)