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Title: TRAFFIC FLOW CONTROL IN CONGESTED MOTORWAY NETWORKS USING BUFFERS
Accession Number: 00753986
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Around large urban areas, daily recurrent congestion in the form of queueing at bottlenecks is nowadays a normal pattern. Apart from the congestion that directly follows from the capacity deficit at bottlenecks, more and more motorways are affected by a secondary congestion problem due to blocking of motorway exits and entries by long queues that build up upstream of bottlenecks, causing delay to travelers who are not going through the bottleneck. A solution to avoid congestion-induced blockage is the construction of so-called buffer facilities. These are local widenings of the motorway by adding one or more lanes just before a bottleneck. Buffers can shorten queues by an amount that is more than proportional to the number of added lanes. In this way congestion-induced blockage can be avoided and total delay is reduced significantly. Buffers are a cost-effective way to fight motorway congestion. The principles and functioning of buffer facilities are explained. Design elements and criteria as well as calculation of buffer dimensions are considered. Attention is given to the control of traffic flow at the entrance and exit of buffers. This is demonstrated with a case study from the Netherlands.
Supplemental Notes: This paper appears in Transportation Research Record No. 1612, Highway Geometric Design Issues.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Broeren, PTWWESTLAND, DPagination: p. 34-41
Publication Date: 1998
Serial: ISBN: 0309064570
Features: Figures
(7)
; References
(7)
; Tables
(3)
TRT Terms: Uncontrolled Terms: Geographic Terms: Old TRIS Terms: Subject Areas: Design; Highways; Operations and Traffic Management; I20: Design and Planning of Transport Infrastructure; I73: Traffic Control
Files: TRIS, TRB, ATRI
Created Date: Sep 30 1998 12:00AM
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