The A4311 is the old main road out of Swindon to the north. Originally part of the A419, it was renumbered A345 when that road was moved to the bypass.
The road starts at traffic lights where northbound slip roads from the A419 meet a parallel service road. There are no southbound slip roads here; for those you need to follow the service road (the B4534) north about half a mile. Prior to 2008 this junction was a simple at-grade roundabout; the upgrade has improved traffic flow but made things far more confusing.
The A4311 heads south and almost immediately reaches traffic lights. The road ahead may or may not be the A4198; either way, the A4311 TOTSOs left to continue south along the D2 Cricklade Road. The central reservation is lost at the next set of lights and then we pass the town's park-and-ride site.
We now get within sight of houses but these are not accessible from the A4311 for a short distance further. We then cross the B4006 at a double mini-roundabout before descending. There's a right turn for buses only along the old line of the A345 whilst we bear left back onto D2 to bypass the suburb of Gorse Hill. There are a few roundabouts to serve housing and industry and then we run alongside the railway line for the last section. The road ends at the southern of the two Transfer Bridge roundabouts on the inner ring road, which is the A4313 to the left and the B4289 ahead.