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A1081 between The Common, Harpenden and Hertfordshire boundary, Hertfordshire (Grid ref TL100169) A1081 between LA boundary and M1, Central Bedfordshire (Grid ref TL093183) A1081 between LA boundary and M1 junction 10a southern roundabout, Central Bedfordshire (Grid ref TL093183) M1 between LA boundary and J10, Central Bedfordshire (Grid ref TL087181) M1 between J9 and Hertfordshire boundary, Hertfordshire (Grid ref TL091153) M1 between J10 and J10A, Central Bedfordshire (Grid ref TL089187) M1 between J10 and J10A off ramp, Central Bedfordshire (Grid ref TL089187) A1081 between M1 junction 10a southern roundabout and LA boundary on bridge, Central Bedfordshire (Grid ref TL091188) A1081 between M1 junction 10a southern roundabout and on slip heading to M1, Central Bedfordshire (Grid ref TL091189) A1081 between M1 junction 10a southern roundabout and on slip heading away from M1, Central Bedfordshire (Grid ref TL092189) A1081 between M1 junction 10a off slip and M1 junction 10a on slip, Central Bedfordshire (Grid ref TL091189) A1081 between M1 junction 10a Northern roundabout and on slip heading to M1, Luton (Grid ref TL091190) A1081 between M1 junction 10a Northern roundabout and on slip heading away from M1, Luton (Grid ref TL091190) A1081 between M1 junction 10a and LA boundary, Central Bedfordshire (Grid ref TL094191) A1081 between M1 junction 10a northern roundabout and LA boundary on bridge, Luton (Grid ref TL090190) A5 between B4540 and M1 jn9, Hertfordshire (Grid ref TL086150) A5 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL091146) M1 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL091146) M1 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL092146) A1081 between M1 and LA boundary, Central Bedfordshire (Grid ref TL094191)