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Testing alternative treatments for underused carpool lanes on narrow freeways

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  • Lapardhaja, Servet
  • Jalota, Devansh
  • Doig, Jean
  • Almubarak, Abdullah
  • Cassidy, Michael

Abstract

Carpool lanes that are not filled to capacity can spell trouble, particularly when deployed on narrow freeways with only 3 lanes in each travel direction. Two alternative treatments for underused carpool lanes were evaluated with this in mind. Both can boost discharge flows by opening a portion of the carpool lane to all freeway traffic in the vicinity of a bottleneck. The simpler of the two alternatives opens the lane segment on a permanent basis. The other does so intermittently. Both alternatives leave the carpool lane intact on segments well upstream of an active bottleneck. Carpools are thus still enabled to bypass slower-moving queues in a freeway’s regular-use lanes. Both alternatives have previously been proposed, but were yet to be tested.

Suggested Citation

  • Lapardhaja, Servet & Jalota, Devansh & Doig, Jean & Almubarak, Abdullah & Cassidy, Michael, 2021. "Testing alternative treatments for underused carpool lanes on narrow freeways," Transportation Research Part A: Policy and Practice, Elsevier, vol. 149(C), pages 139-149.
    • Handle: RePEc:eee:transa:v:149:y:2021:i:c:p:139-149
    DOI: 10.1016/j.tra.2021.05.002
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    References listed on IDEAS

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