 The notorious hump-backed Sulby Bridge on the A3 road located at the northern end of the Sulby Straight (built c.1815), considered at the time to be the most difficult part of the TT Course for motor-cycle competitors was removed in 1922/23 by the Isle of Man Highway Board and the road widened and road profile improved.The Sulby Bridge was originally built c.1739 as a result of the 1739 Bridges Act to improve access to roads in the Isle of Man.The nearby ‘Five Ton Bridge’ over the Sulby river was built in 1935 on the Sulby Claddagh to replace a ford and footbridge damaged in flooding in September 1930.