I-205/I-580 Corridor
State of California, Department of Transport
Project highlights
- I-205/I-580 Freeway Corridor (involving steep gradients)
- 50 km freeway and interchange model
- Calibrated and validated to Caltrans microsimulation guidelines
- 7 hour modelled afternoon/evening PM period
Braidwood Associates, a leading microsimulation specialist was appointed by State of California Department of Transportation to develop a freeway model of a section of I-205/580 corridor, located mostly within the boundaries of District 10 (and part of District 4).
As the study area is part of the main corridor within San Joaquin and Alameda counties, highways in the immediate area are heavily congested the primary cause being commuters travelling to work in the San Francisco Bay Area from the Central Valley. Morning (AM) commute period is congested in the westbound direction while the PM commute period is congested in the eastbound direction. The study area covered a 50Km section of a highly congested freeway and included the modelling of 12 freeway interchanges including 3 major freeway-to-freeway interchanges, I 580/I 205 and I 5/I 205 and I 5/SR 120.
A major element of this project was the inclusion of link gradients particularly on the freeway section of the network as a combination of steep gradients and a high proportion of truck traffic has a significant impact of traffic flow.
The model was calibrated and validated to CDOT Microsimulation Guidelines for the peak period (all 7 hours) and the peak hour.
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