|Location Map ( geo)|
|To:||Wimpole Lodge (TL332489)|
|Via:||Potton & Wrestlingworth|
|Distance:||11.5 miles (18.5 km)|
|Meets:||A1, A603, B1040, A1198, A603|
|Route outline (key)|
Starting at a roundabout on the A1 Sandy bypass the road heads east into town, where it bears right at a roundabout then climbs to cross the East Coast Main Line above the station. The road then continues east across Sandy Warren, passing the RSPB HQ, to reach Potton, where there's a brief multiplex along the B1040.
Originally, this road was numbered A603 explaining why the B1042 meets the A603 at both ends and seems to fill in the gap in that road's route. In fact, this section was downgraded to Class II status to persuade traffic to use the A428 instead.
The reason the number B1042 was chosen for the downgraded section of A603 is because it already existed in Sandy. The original route of the B1042 was along St Neots Road in Sandy, connecting the centre of town to the A1 heading north. When the B1042 was downgraded this original section became a spur and was then declassified in the 1990s.