Development of the Displaced Right-Turn Intersection

Abstract

The displaced right-turn concept is an innovative traffic signal intersection being developed for the United Kingdom highway network by the Highways Agency. The concept of the displaced right turn has been considered since the 1950s as an alternative intersection design to traditional at-grade and grade-separated intersections. It enables one or more conflicting movements to take place away from the main intersection at a new crossover intersection, which reduces the number of conflicts at the central node. Tests have shown intersection capacity can increase with a footprint similar to a large roundabout and only a small increase in costs.