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Paramics Plugins

Paramics Truck Behavior and Vehicle Control

Truck Behavior plugin is designed to model the range of lanes and speed that trucks are allowed to operate or usually operate in the field on different sections in a Paramics simulation network. It can also be applied to other vehicle types to achieve the same modeling purpose.

Paramics Lane Management Plugin

Lane Management plugin is designed to model lane closures (due to incident or workzone) and drivers’ response to the lane closure messages shown in Changeable Message Signs (CMS) or gantries based on a typical procedure of lane closure in the real world.

Plugin Features:

  • Allows multiple lane closure schedules
  • Each schedules may include multiple closing links, decision links, and CMSs
  • Informed vehicles make a lane change based on Paramics Core lane changing behaviors
  • GUI display locations with lane closure
  • Reports errors in Info Browser

Paramics Point-to-Point Travel Time (Freeway MOE)

This plugin collects point-to-point travel time and delay data. Typical applications of this plugin are:

  • Point-to-point travel time between two detectors along freeway mainline
  • Onramp delay (from queue detector to onramp detector)
  • Point-to-point travel time along an arterial

 

Plugin Features:

  • Collects travel time and delay data from multiple sections
  • User can define the report cycle
  • User can define the vehicle type(s), and lane(s) from which travel time data are collected
  • Definable sampling rate for each section
  • Definable delay threshold
  • GUI display sections with travel time data collection
  • Reports Errors in Info Browser and log files

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)

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).

The TOS can be operated under traffic-responsive or pre-timed metering control. It has two traffic responsive control logics, which are occupancy logic and volume logic. Under traffic responsive control, a meter can be operated under volume logic or occupancy logic. If both occupancy and volume logics are enabled, the most restrictive of the two rates is applied.

Paramics SDRMS Ramp Metering Control (Occupancy Control logic)

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).

The SDRMS can be operated under traffic-responsive or pre-timed metering control. It has two traffic responsive control logics, which are occupancy logic and volume logic. If both occupancy and volume logics are enabled, the most restrictive of the two rate codes is applied.

Paramics SATMS Ramp Metering Control (Demand Capacity logic)

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).

The SATMS can be operated under traffic-responsive metering control or pre-timed metering control. The theory behind the traffic-responsive metering control of the SATMS is based on demand-capacity control.

Paramics Detector Data Aggregation Plugin

By default, Paramics can collect and output different loop detector data. However, it is not easy to use. Often, it generates way too many files, each of which is specific to each lane of detector. Aggregated occupancy data reported by Paramics are also time occupancy data rather than the percentage occupancy normally obtained from the field.

Our detector data aggregation plugin emulates the real-world detector data collection. It gathers point loop data at each time step of simulation and aggregates them every interval specified by the user. The user can also choose to obtain raw or smoothed data. Aggregated loop data (volume, occupancy, and speed) can be output to text files, and can be also accessed by interface functions defined in the plugin.