The road measures 15.75 miles long and would take a car obeying speed limits 35 minutes to travel its length.
The A921 is a A Road and is located in the Zone 9 Highways Region.
This is a true long-distance route, journeying through numerous towns like INVERKEITHING, Hillend, Dalgety Bay, Aberdour, BURNTISLAND, Kinghorn, and KIRKCALDY.
The road is located entirely within Fife.