sentences:  Drivers have been warned by North Yorkshire Police about safety, especially as the roads are prone to icing over in winter, which adds to the danger.Traffic calming measures were implemented outside the Secondary School in Richmond in 2008 and new signage was erected on the unclassified road leading to Halfpenny House Junction on the A6108.The suspension bridge over the River Ure at Middleham is subject to a height restriction of with poor advanced signage.