 This included the building of a number of sheep-gates including the East Mountain Gate, the Beinn-y-Phott sheep-gate and Keppel Gate.The primary A18 Mountain Road section road from Park Llewellyn (North Barrule) to Keppel Gate is a product of the Disafforesting Commission of 1860 and it reflects typical nineteenth century highway and railway construction practices which includes many small scale cuttings, embankments and revetments which follow land contours with purpose built graded-sections intersected by right-angle bends, road junctions and sheep-gates.Improvements including road widening and landscaping occurred at the 26th Milestone for the 1938 TT races.