The road measures 9.87 miles long and would take a car obeying speed limits 24 minutes to travel its length.
The B4603 is a B Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like SWANSEA, Landore, Plasmarl, Morriston, Swansea Enterprise Park, Ynysforgan, Ynystawe, Clydach, and Pontardawe.
The road connects West Glamorgan and West Glamorgan.