DOTD support for UTC project : development of an optimal ramp metering control strategy for I-12, [research project capsule].
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DOTD support for UTC project : development of an optimal ramp metering control strategy for I-12, [research project capsule].

Filetype[PDF-168.72 KB]


  • English
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    Details:

    • Creators:
      Ishak, Sherif
    • Corporate Creators:
      Louisiana Transportation Research Center
    • Subject/TRT Terms:
    • Publication/ Report Number:
      14-1SS
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      Louisiana
    • Corporate Publisher:
      Louisiana Transportation Research Center
    • Abstract:
      From June to November of 2010, the Louisiana Department of Transportation and

      Development (DOTD) deployed ramp metering control, using a simple pre-timed operation

      with a fixed cycle length (2 seconds of green/2 seconds of red), along a 15-mile section of I-12

      in Baton Rouge, LA. Ramp metering was implemented to reduce congestion, provide a safer

      merge operation at freeway entrances, and improve travel time reliability of the corridor.

      A recent evaluation of the effectiveness of the ramp metering strategy was inconclusive

      in determining whether the fixed time operation of the control system yielded significant

      reductions in congestion along the corridor. Therefore, the study recommended further

      investigation to examine the feasibility of applying dynamic ramp metering algorithms on I-12,

      wherever applicable. Demand responsive and coordinated ramp metering strategies involve a

      system where the signals change every few seconds in response to freeway conditions locally

      or at adjacent interchanges. The signals may work as individually or in coordinated clusters to

      resolve complex traffic problems and reduce congestion along the freeway. In either case, the

      dynamic control of the signals is feasible through Freeway Control Regulators (algorithms) that

      tend to optimize the capacity of the freeway.

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