Abstract
The frequency, nature, and causes of vehicle encroachments on medians of divided highways were investigated to obtain information needed to establish traffic safety criteria for median width and cross section design. The effects of median width and cross section, traffic volume, roadway alignment, weather, roadwide signs, grade separation structures, and other features of the highway and driving environment were considered. Relationships between traffic volume and the frequency and nature of vehicle encroachments on medians are presented. The recommendations include minimum design requirements for the safe stopping or control of vehicles in the median. (Author/publisher)