Multi‐level pedestrian signalisation atlarge four‐leg roundabouts. Issue 8 (22nd May 2018)

• Record Type: Journal Article
• Authors: Xu, Hongfeng; Zhang, Kun; Zheng, Qiming; Yao, Ronghan
• Is Part Of: IET intelligent transport systems. Volume 12:Issue 8(2018)
• Page Start: 838
• Page End: 850
• Publication Date: 2018-05-22
• Subjects: road traffic control -- pedestrians -- road vehicles -- object detection; MPS -- pedestrian accessibility -- large four‐leg roundabouts -- staggered crosswalk location -- two‐stage crossing -- multilevel pedestrian signalisation -- traffic control devices -- traffic detection systems -- right‐of‐way -- adjacent crosswalks -- traffic events -- signal operations -- traffic demand -- operational stability; Intelligent transportation systems -- Periodicals; Electronics in transportation -- Periodicals; 388.31205
• DOI: 10.1049/iet-its.2017.0155
• Languages: English
• ISSNs: 1751-956X

Abstract

Abstract : 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.