The road measures 35.09 miles long and would take a car obeying speed limits 1 hours and 11 minutes to travel its length.
The A721 is a A Road and is located in the Zone 7 Highways Region.
This is a true long-distance route, journeying through numerous towns like Uddingston, BELLSHILL, Bellshill Industrial Estate, MOTHERWELL, WISHAW, Waterloo, Bogside, CARLUKE, Kilncadzow, Cleghorn, Carnwath, Elsrickle, and Blyth Bridge.
The road connects Lanarkshire and Tweeddale.