PROCEDURE TEST LOCATION Selection of the test location involved choosing a high-accident location where excessive speed was suspected of contributing to accidents and where warning signs have not solved the problem. A location on US 60 in Meade County, Kentucky, was selected (ADT= 4,890). The problem curve is at the beginning of a 1.6-km (1-mile) section which has been extremely hazardous. The location had been identified as a high-accident location and conventional signing and marking had been installed. In the preceeding 6 years, 48 accidents occurred on this curve. All but two involved eastbound vehicles leaving the roadway or crossing the centerline and colliding with westbound vehicles. The eastbound approach was, therefore, critical. In 36 of the accident reports, speed was mentioned as a contributing circumstance. Investigating teams had recommended reconstruction since accident occurrence had not been reduced through operational measures. LAYOUT OF MARKINGS

In rural areas, warning devices should normally be placed about 229 m (750 feet) in advance of the hazard (5). The total length of roadway to be marked should, therefore, be about 229 m (750 feet). The following formula was used to determine an adequate distance