Pedestrian accessibility to a large four‐leg roundabout can be improved by locating staggered crosswalks on all roundabout legs and signalising them to allow for two‐stage crossing. A multi‐level pedestrian signalisation (MPS) is developed for such roundabouts to balance pedestrian accessibility and vehicle mobility. With appropriate application of traffic control devices and traffic detection systems, the right‐of‐way is assigned to pedestrians and vehicles in three actuated modes. Signals at adjacent crosswalks can operate independently or as a group in a specific mode of right‐of‐way to prioritise pedestrians or vehicles. A number of traffic events are defined to autonomously manage signal operations second by second. Simulation results indicated that MPS had good operational stability and offered sufficient capacity for a large four‐leg roundabout to serve traffic demand varying in a wide range. The appealing operational advantage of the MPS‐enabled roundabout over the fully actuated conventional intersection may help prevent large four‐leg roundabouts from being converted to conventional intersections.
Multi‐level pedestrian signalisation atlarge four‐leg roundabouts
IET Intelligent Transport Systems ; 12 , 8 ; 838-850
2018-10-01
13 pages
Article (Journal)
Electronic Resource
English
traffic control devices , traffic events , adjacent crosswalks , multilevel pedestrian signalisation , traffic detection systems , signal operations , object detection , two‐stage crossing , right‐of‐way , road traffic control , staggered crosswalk location , large four‐leg roundabouts , MPS , pedestrians , pedestrian accessibility , traffic demand , road vehicles , operational stability
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