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Transportation Demand Management Strategies for Managed Lanes


Demand management strategies can change travel behavior, incentivizing individuals to carpool or take alternative modes to reduce congestion and energy consumption. Managed lane systems, as a demand management strategy, can also increase travel speeds and provide reliable trips to commuters traveling in carpools, vanpools, or express buses. However, some priced managed lane systems currently appear to be having a negative impact on carpool formation and retention and a neutral impact on express bus use (as seen on CUTR 95 Express, Atlanta I-85, etc.). Some managed lanes are also becoming congested during the peak when non-tolled users are present (e.g., use of lanes by clean-fuel or government vehicles) and maximum toll rates (toll caps) are in place. That is, demand for use of the priced lane exceeds the lane capacity at the price cap. Hence, there is a need to identify regional-level, corridor-level, and real-time facility-oriented demand management incentives and communication strategies that will incentivize carpooling and transit use to manage peak demand, achieve vehicle occupancy goals, and enhance person-throughput on managed lane corridors.


The goal of the research is to develop practical guidance for regional transportation planning agencies and managed lanes operators to support the development and ongoing implementation of managed lanes demand management strategies designed to incentivize carpooling and transit use, better manage peak demand, and help meet vehicle occupancy and other performance goals on managed lane corridors.


The proposed research will:

  • Assess the potential impacts of non-priced vehicles, toll caps, pricing implementation policies, and incentives communications strategies on changes in behavior and system performance based upon a review of current facility operations.

  • Identify data requirements for assessing the behavioral impacts of demand management strategies on managed lane carpool and transit use at regional, corridor, and facility levels.

  • For a subset of first and second-generation managed lanes facilities, with and without pricing implementation, assess observed changes in carpooling and transit use.

  • Propose data collection strategies that can be implemented by managed lane operators to provide reliable and sufficient data to assess carpool and transit use in behavioral analysis.

  • Develop guidance for effective incentive implementation and evaluation that takes into account the policy learning from the previous steps, and identify how demand management strategies should be assessed within regional transportation plans, transportation project assessments, and tolling and revenue studies.

Sponsoring Committee:ACP35, Managed Lanes
RNS Developer:Nick Wood
Source Info:This research need was originally developed as part of a working group of members and friends of the TRB Managed Lanes Committee (AHB35). The working group consisted of these individuals: Randall Guensler, Robert Bain, Ross Chittenden, Elizach Dembinski, Casey Emoto, Chuck Fuhs, Darren Henderson, Md Sakoat Hossan, Thomas Jacobs, Dave Kristick, Jonathan Peters, Srikanth Panguluri, Myron Swisher, Patrick Vu, and Nick Wood.
Date Posted:09/20/2018
Date Modified:05/01/2019
Index Terms:Travel demand management, Managed lanes, Carpools, High occupancy vehicle lanes, High occupancy vehicle lanes, Vehicle occupancy, Peak periods, Modal shift,
Cosponsoring Committees: 
Public Transportation
Data and Information Technology
Operations and Traffic Management

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