Traffic control

Traffic control

TransModeler Detector Data Aggregation and Ramp Metering plugin

The plugin utilizes the API functions from TransModeler to perform the following functions:

  • Detector data aggregation
  • Ramp metering control based on the following logic:
    • SATMS (demand capacity logic), deployed in Caltrans District 7 (Los Angeles County) and 12 (Orange County)
    • SDRMS (volume control and occupancy control logic), deployed in Caltrans District 11 (San Diego), District 8 (Riverside and San Bernadino), District 3 (Sacramento)
    • ALINEA

 

Release Notes

11/1/2011:

Development of an ALINEA based coordinated ramp metering plugin

SDRMS ALINEA Coordinated Ramp Metering Plugin

San Diego experiences significant traffic congestion during peak travel periods, has limited HOV and HOT lanes, and has limited transit capacity. Potential solution is to increase multi-jurisdictional and multi-agency collaboration on corridor management. The San Diego I-15 corridor was chosen as a site for Analysis, Modeling and Simulation (AMS) of Integrated Corridor Management (ICM) strategies. One strategy proposed by the study team is coordinated ramp metering control.

ALINEA Ramp Metering Plugin

ALINEA Ramp Metering Plugin

This plugin implements the ALINEA ramp metering algorithm in PARAMICS. The ALINEA algorithm, proposed by Papageorgiou et al, is a local feedback ramp metering strategy, which attempts to maximize mainline throughput by maintaining a desired occupancy on the downstream mainline freeway. Compared to other traffic-responsive ramp metering algorithms, ALINEA is remarkably simple, highly efficient, and easily implemented. According to the results from field tests and simulation-based studies, ALINEA has very good performance.

Paramics TOS Ramp Metering Control (Occupancy Control Logic)

TOS Ramp Metering Plugin

This plugin implements the TOS (Traffic Operations System) ramp metering algorithm in PARAMICS. The TOS is one of the most widely used ramp metering systems in California. It is currently deployed in District 4 (Bay Area).

Paramics SDRMS Ramp Metering Control (Occupancy Control logic)

SDRMS Ramp Metering Plugin

This plugin implements the SDRMS (San Diego Ramp Metering System) ramp metering algorithm in PARAMICS. The SDRMS is the most widely used ramp metering systems in California. It is currently deployed in District 3 (North Central), District 8 (Riverside/San Bernardino), and District 11(San Diego/Imperial).

Paramics SATMS Ramp Metering Control (Demand Capacity logic)

SATMS Ramp Metering Plugin

This plugin implements the SATMS (Semi Actuated Traffic Metering System) ramp metering algorithm in PARAMICS. The SATMS is one of the ramp metering systems used in California. It is currently deployed in District 7 (Los Angeles) and District 12 (Orange County).

Vissim Detector Data Aggregation and Ramp Metering plugin

Vissim Detector Data Aggregation and Ramp Metering plugin

The plugin utilizes the API functions from VISSIM to perform the following functions:

Paramics Actuated Signal Module Development

Engineers in CLR Analytics have accumulated profound actuated signal control knowledge through various academic and practical projects. We even developed a couple versions of actuated signal control plugins under Paramics during the last decade.

Transit Signal Priority Modeling for the Crenshaw Corridor

Crenshaw Light Rail Project Area

The light rail along Crenshaw Blvd will have light rails operated above the ground between north of 48th and south of 59th St. This project aims to develop a microscopic traffic simulation model to simulate vehicles, light rails and pedestrians  for the study area. The model can be used to analyze the transit design and its operation, optimize the signal control, and investigate the interactions among vehicles, light rails and pedestrians.

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