Abstract
The purposes of this study were: 1) to evaluate the new ramp design (exit and entrance ramps combined into one paved surface separated only by a double yellow line) using actual counts of wrong-way movements and comparing them to data collected in previous research, and 2) to make counts of wrong-way movements on about ten other combined ramps to determine if any have problems. A total of 17 ramps were monitored under this study. Three ramps were considered to have serious wrong-way count problems. On all three ramps countermeasures were taken to reduce the wrong-way movements. Final conclusions are that the combined ramp geometry does reduce the number of wrong-way movements. But alternate forms of signing and marking may be needed. (A)