|From:||Hotwell Road (ST577727)|
|Via:||Jacob's Wells Road|
|Distance:||0.5 miles (0.8 km)|
|Met (1923):||B3122, A4018|
|Now part of:||B4466|
|Route outline (key)|
By 1926, the B3122 here had been upgraded to become part of the A36 (later A4) with the opening of the Portway. The existence of the route, being entirely north of the Avon, yet receiving a 3 zone number, gives evidence that the A4018 formed part of the original 3 / 4 zone boundary.