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Evaluation of Work Zone Strategies at Signalized Intersections

Khaled Shaaban and Dina Elnashar
1. Qatar University/Department of Civil and Architectural Engineering, Doha, Qatar
2. Qatar Mobility Innovations Center, Doha, Qatar
Abstract—Reducing congestion in work zones and improving mobility has become more crucial than ever especially with  the increased number of road projects. Work zones at street intersections are costly due to the delay experienced by both contractors and motorists. Work zones at signalized intersections are needed in the case of new construction, re-building the signal, or maintaining an existing traffic. This type of work can significantly affect traffic operations at intersections. Any lane reduction due to the construction zones will result in significant congestion. Another alternative is to reduce the existing lanes width and the speed limit instead of closing lanes. Although the literature shows statistics on work zone operations especially on freeways, there is a lack of information about signalized intersections. The purpose of this paper is to compare the amount of motorist delay that would accrue along the work zone from two strategies. Alternative 1 is based on reducing the number of lanes at the intersection and Alternative 2 is based on reducing lanes’ width and maintaining the number of lanes at the intersection. The conducted methods showed that Alternative 2 provided better system operational performance than Alternative 1 for the cases tested.

Index Terms—Work zones, traffic signal, intersections

Cite:Khaled Shaaban and Dina Elnashar , "Evaluation of Work Zone Strategies at Signalized Intersections," Journal of Traffic and Logistics Engineering, Vol. 1, No. 2, pp. 202-206,  December 2013. doi: 10.12720/jtle.1.2.202-206
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