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<p>Work zones constitute critical bottlenecks in highway networks due to temporary geometric and operational modifications that alter traffic-flow characteristics and reduce roadway performance. This study investigates the effects of work-zone configurations and roadway geometric design on traffic capacity using the microscopic traffic simulation software VISSIM. Simulation models representing roadway segments under both normal operating conditions and work-zone conditions were developed, calibrated, and validated to accurately replicate field traffic behaviour. A parametric analysis was subsequently conducted by varying work-zone length, taper length, and the number of lane closures. Traffic-flow parameters, including speed, density, and flow, were extracted from the simulation outputs and analysed to establish the corresponding traffic-flow relationships. The roadway capacity for each scenario was estimated using the North-Western model. The results indicate that capacity increases with increasing work-zone and taper lengths, while it decreases as the number of lane drops increases due to intensified merging manoeuvres and flow disruptions. The findings provide quantitative insights into the influence of work-zone design parameters on traffic operations and can support the development of effective work-zone management strategies for maintaining adequate roadway capacity and accommodating traffic demand.</p>

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Investigating the effect of variation in work-zone roadway geometry on traffic capacity using simulation technique

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Omkar Bidkar,
  • Pallav Kumar,
  • Shriniwas Arkatkar,
  • Gaurang Joshi,
  • Said M. Easa

摘要

Work zones constitute critical bottlenecks in highway networks due to temporary geometric and operational modifications that alter traffic-flow characteristics and reduce roadway performance. This study investigates the effects of work-zone configurations and roadway geometric design on traffic capacity using the microscopic traffic simulation software VISSIM. Simulation models representing roadway segments under both normal operating conditions and work-zone conditions were developed, calibrated, and validated to accurately replicate field traffic behaviour. A parametric analysis was subsequently conducted by varying work-zone length, taper length, and the number of lane closures. Traffic-flow parameters, including speed, density, and flow, were extracted from the simulation outputs and analysed to establish the corresponding traffic-flow relationships. The roadway capacity for each scenario was estimated using the North-Western model. The results indicate that capacity increases with increasing work-zone and taper lengths, while it decreases as the number of lane drops increases due to intensified merging manoeuvres and flow disruptions. The findings provide quantitative insights into the influence of work-zone design parameters on traffic operations and can support the development of effective work-zone management strategies for maintaining adequate roadway capacity and accommodating traffic demand.