The A1155 is a through route in Stevenage, Hertfordshire.
The road starts on a roundabout on the A1072, the western ring road in Stevenage, and heads east along the D2 Fairlands Way. After going under the East Coast Main Line the road crosses the A602 at a roundabout on the corner of the town centre. It then goes under a pedestrian footbridge, on the line of the old Great North Road. We leave the town centre behind at the next roundabout. The road leaving here is marked on maps as having Class I status but its number is elusive: at this end it's signed as (A602) and merely as "town centre parking" at the other, so perhaps it's a spur of the A1155.
After the next roundabout, which serves residential areas, the road narrows to S2 but stays on Fairlands Way. The verge to the right seems wide enough to suggest that this road was planned to be dual but the westbound carriageway was never built. There are a couple of mini-roundabouts serving housing estates before another full roundabout is met. Fairlands Way continues ahead, now on the B1037, whilst the A1155 turns left onto Verity Way, which also has space for future dualling. The road ends at the next full roundabout back on the A1072, which also ends here.