The tram road gauge is not known, but the OS map depiction suggests that standard gauge of 4 ft 8.5 in. was in use on the Dreghorn section at least, as the Towerlands Colliery tram road ran on to standard gauge railway exchange sidings at Dreghorn railway station.OS Map - Ayr Sheet XVII.14 (Irvine) Survey date 1856. Publication date 1860
