Engineering Group Takes on High Speed Limits and the 85th Percentile (War on Cars Watch)

Critics say that such a rule raises the speed limit to what drivers want as opposed to what is safe for that road’s condition or context. The current edition of the Manual on Uniform Traffic Control Devices say that engineers may use other criteria — like the presence of pedestrians — in setting speed limits. But the new language orders them to use that information in addition to the 85th percentile rule.