Exploring the effectiveness of variable speed limit controls on highway work-zone operations

  • Published: Intelligent Transportation Systems, 8:1–14, 2004
  • Authors: P. Lin, K. Kang and G. Chang
  • Date Added: 04 Feb 2013
  • Last Update: 12 Feb 2016
  • Format: pdf

Objectives: To evaluate variable speed limit algorithms with the aim to increase work zone throughputs and reduce vehicle delays.

Methodology:

Computer traffic simulations with varying variable speed limit algorithms.

Key Findings:

  • Variable speed limit controls result in traffic flow with substantially lower speed variances than non-controlled scenarios.

  • Reduction in speed variances may indirectly contribute to safety improvements.

Themes:

Variable speed limit, algorithm, speed variance

Comments:

Although computer simulation only, this report adds to the body of evidence that variable speed limit systems can smooth traffic flow at road works.

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