Travel Demand Modeling

An Integrated Simulation Platform (Aug 1, 2015)

SR-91 PA/ED between SR-55 and SR-57

The study area for the SR-91 TSR extends from west of Tustin Avenue to east of Imperial Highway and includes SR-55 from the SR-91/SR-55 connector to south of Lincoln Avenue. There are four project alternatives for the build out year of 2025: No Build, Option 1A, Option 3, and Option 3L.


The No-Build alternative or option incorporates funded projects that are currently being constructed or environmentally cleared as part of the Caltrans PSR-PDS.

Evaluating System Impacts of Automated Vehicles: A Multiple-Resolution Modeling Approach

The rapid development of automated vehicles has attracted a lot of attentions from the public in recent years.  Current studies on automated vehicles mainly focus on microscopic simulations with simple network topologies and driver behaviors, and few has considered to incorporate automated vehicles into macroscopic travel demand models for the analysis in a regional network.  


I-10 Robertson Circulation Improvement Project (Apr 17, 2015)

The Michael Baker International team, with SMG and CLR Analytics as a modeling and simulation subcontractor, won LADOT's I-10 Robertson National Circulation Improvement Project. CLR modelers will use travel demand modeling and traffic simulation tools to test different design scenarios for the project.


I-680 Corridor System Management Plan (Contra Costa, CA)

The project  involved the use of Contra Costa Transportation Authority (CCTA) travel model to provide demand input data to TOPL and to evaluate the impacts of various projects on arterial diversion and freeway performance. The study corridor is the stretch of I-680 corridor between I-580 in the south and the Solano county line in the north. The challenge of the project is how to model the currently deployed HOT facilities and some upcoming HOT facilities that will be converted from HOV lane in future scenarios since there is no toll demand estimation and analysis module in the model.

OCTAM Model Enhancements

OCTAM Model network

This is a subtask under a number of Caltrans Corridor System Management Plan (CSMP) projects, including SR-91, SR-57, SR-22/I-405, and I-5 in Orange County, California. OCTAM model is the travel demand model for Orange County. We improved and enhanced the TransCAD version of the model to fit to the demand extraction, demand estimation, subarea analysis, and macro modeling tasks for these CSMP projects. We added a number of functional modules to the GUI on top of the original GISDK codes obtained from OCTA.

I-405 Corridor System Management Plan in Los Angeles County, California

I-405LA CSMP Study Area

The study site is I-405 in Los Angeles County, California. It is 36 miles in length stretching between the I-110 interchange (CA PM 12.5) and the I-5 interchange (CA PM 48.5). Our tasks for the study include demand extraction from the SCAG travel demand model for micro simulation, ramp metering setup in the Paramics simulation models, and the analysis of the travel pattern of trips made on the corridor through a select link analysis.


Sponsor: Caltrans, SCAG

SR-58 Traffic Projections, Barstow, CA

The project involves the use of the SCAG travel demand model to estimate the traffic increase along a portion of the SR-58 corridor in Barstow.

I-5 Corridor System Management Plan in Los Angeles County, California

I-5LA Study Area

The study area for this project is divided into two parts.  The southern part starts at CA post mile 0.000 (OC/LA line) to CA post mile 13.784 (I-710) The northern part starts at CA post mile 18.452 (I-10) to CA post mile 44.014 (I-210).

I-210 Corridor System Management Plan in Los Angeles County, California

I-210 CSMP Study Area

The study site is I-210, which is 45-mile long between the I-5 interchange (CA PM 0.0) and the SR-57 interchange (CA PM 45.0) in Los Angeles County, California. The study aims to determine the travel pattern of trips made on the corridor using the SCAG travel demand model. A select link analysis was performed to isolate the I-210 study corridor and identified the origins and destinations of trips made on the corridor.



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