Looking south along the B4630, Watford Road, in Chiswell Green
The B4630 was formerly the final mile and a half of the original route of the A412 into St Albans from the southwest. The road gained its number around 1980.
Starting at a roundabout on the A405 the B4630 heads vaguely northwards through Chiswell Green. The road is built-up and suburban from the outset. We cross a couple of mini-roundabouts by a row of shops, after which the road becomes D1 (it was presumably D2 at one time but the carriageways have been narrowed to include cycle lanes).
After going over the A414 (formerly M10) the road narrows again as it enters St Stephen's, a suburb of St Albans. We follow a leafy route to end on the A5183 (former A5) at a mini-roundabout by St Stephen's Church. The road ahead continues into the city centre.