Samenvatting
The frequency, nature and causes of vehicle encroachments on median of divided highways were investigated to obtain informa- tion needed in establishing traffic safety criteria for median width and cross sectiondesign. The effects of median width and cross section, traffic volume, roadway alignment, weather, roadside signs, grade separation structures and other features of the highway and driving environment were considered. Rela- tionships between traffic volume and the frequency and nature of vehicle encroachments on medians are presented. The recom- mendations include minimum design requirements for the safe stop- ping or control of vehicles in the median.