Institutional-Repository, University of Moratuwa.  

Effectiveness of vehicle-actuated signals for at grade four legged intersections in Sri Lanka: a comparison study against existing fixed-time traffic signals

Show simple item record

dc.contributor.author Kamalrajh, A
dc.contributor.author Bandara, JMSJ
dc.contributor.editor Pasindu, HR
dc.date.accessioned 2022-06-09T05:35:04Z
dc.date.available 2022-06-09T05:35:04Z
dc.date.issued 2011-07
dc.identifier.citation Kamalrajh, A., & Bandara, J.M.S.J. (2011). Effectiveness of vehicle-actuated signals for at grade four legged intersections in Sri Lanka: a comparison study against existing fixed-time traffic signals [Abstract]. In H.R. Pasindu (Ed.), Proceedings of the Transportation Research Forum 2011 (p. 19). Department of Civil Engineering, University of Moratuwa. https://uom.lk/sites/default/files/civil/files/TRF%202011_0.pdf en_US
dc.identifier.uri http://dl.lib.uom.lk/handle/123/18221
dc.description.abstract The goal of traffic engineers in recent years is trying their best to get the most out of the systems that they develop. By designing most efficient systems, using the advancement of electronics the overall costs of transportation should be slightly easier to manage. In Sri Lanka, it is anticipated that the prevailing fixed-time traffic signals would be replaced by modern actuated traffic signals in near future. This study has been carried out to evaluate the efficiency of vehicle-actuated signals against prevailing fixed-time traffic signals prior to their implementation. Several existing signalised intersections in the capital city were carefully studied with their geometric and traffic turning movements. A traffic simulation was programmed in Microsoft Excel in such a way to generate traffic for a typical intersection in an urban area. In order to characterise real dynamic condition of traffic flow, various traffic volume combinations were selected among North-South and East-West through-traffic and other turning movements (Left-turns, Right-turns & Heavy vehicles) were randomised within their permissible limits. Numerous calculations for Cycle time, Vehicle-delay, Pedestrian-delay and Critical movements of different traffic combinations were computed by exploiting a renowned Australian Software called “Signalised (and unsignalised) Intersection Design and Research Aid [SIDRA]”. The outcomes of analysis were compared in graphical and tabular forms for the efficiency of fully- Actuated Signals against fixed-time Signals. It has been found that the replacement of fixed-time traffic signals with fully-actuated signals for stand-alone intersections shall not produce any major enhancement (reduction in delay) to the existing at grade four-legged intersections, which have three standard-approach lanes including right turn-bays with optimum length and two standard-exit lanes. Moreover, it is sensible that semi-actuated signals would be a better alternative for certain signalised intersections where major roads (continuous high demand) meet with minor roads (very stochastic or very low traffic demand). en_US
dc.language.iso en en_US
dc.publisher Department of Civil Engineering, University of Moratuwa. en_US
dc.relation.uri https://uom.lk/sites/default/files/civil/files/TRF%202011_0.pdf en_US
dc.subject Fully-actuated signal en_US
dc.subject Pre-timed signal en_US
dc.subject SIDRA en_US
dc.title Effectiveness of vehicle-actuated signals for at grade four legged intersections in Sri Lanka: a comparison study against existing fixed-time traffic signals en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.identifier.year 2011 en_US
dc.identifier.conference Transport Research Forum 2011 en_US
dc.identifier.place Colombo en_US
dc.identifier.pgnos p. 19 en_US
dc.identifier.proceeding Proceedings of the Transport Research Forum 2011 en_US
dc.identifier.email kamalrajh@gmail.com en_US
dc.identifier.email bandara@uom.lk en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record