The B730 is a secondary road in Ayrshire
It starts from the A713 north of Patna East Ayrshire signed for Drongan. The B730 climbs to 211m then descends to Littlemill and Drongan. Coalhall and the A70 is the next hamlet reached and there is a short Multiplex on the A70 going under a low railway bridge (14'0") on an industrial line only.
The B730 sets out on its own again this time signed for Tarbolton. Trabbach is passed and the River Ayr crossed via a weak/narrow bridge before South Ayrshire is entered. Another link railway line is then crossed before Tarbolton is reached with Dundonald being signed. The next village is Fail where there is another short Multiplex with the A719. The A77 is crossed at Bogend and Dundonald reached with the A759 being crossed at an offset crossroads.
Drybridge is reached and North Ayrshire entered at a narrow railway bridge before the River Irvine is crossed at another narrow/weak bridge. The A71 goes overhead before a link road goes towards a junction. The main line ends at the B7081 in Dreghorn.