The road measures 27.45 miles long and would take a car obeying speed limits 37 minutes to travel its length.
The A477 is a A Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Johnston, Jordanston, Neyland, Honeyborough, Burton, PEMBROKE DOCK, PEMBROKE, Slade Cross, Cosheston, Milton, Sageston, Carew, Redberth, East Williamston, Broadmoor, KILGETTY, Begelly, Stepaside, Llanteg, Tavernspite, Red Roses, Ciffig, and St. Clears.
The road is located entirely within Dyfed.