California Department of Transportation (Caltrans)
State Route 99 Comprehensive Multimodal Corridor Plan
Project
The SR 99 corridor runs between Bakersfield to the south and Sacramento to the north, spanning about 300 miles in Central and Northern California. Consistent with the Caltrans corridor planning process guide, the project team developed a Comprehensive Multimodal Corridor Plan (CMCP) for State Route 99 (SR 99) through the San Joaquin valley.
This CMCP identifies a broad range of multimodal opportunities to improve and enhance the SR 99 corridor and develop a stakeholder-shared vision and implementation plan for the corridor that aligns with state goals to reduce greenhouse gas (GHG) emissions and passenger vehicle miles traveled (VMT) and to increase freight throughput and reliability along the corridor for inclusive economic development.
Our Work
ETG, as a member of a project team, provided performance evaluations of existing conditions, baseline conditions, and various improvement strategies. ETG supported developing quantitative and qualitative assessment methodologies based on the corridor goals and objectives.
To validate California Statewide Travel Demand Model (Statewide Model), ETG coordinated with Caltrans District 3, 6, and 10 and regional modeling staff to review the Statewide Model against eight regional models to ensure consistencies, including traffic volumes, truck volumes or percentage, passenger rail mode share, auto occupancy percentage, and bicycle and non-motorized mode share.
To assess the future alternatives, ETG utilized a variety of modeling tools, including travel demand and microsimulation models, to analyze identified solutions (projects, concepts and strategies).
ETG developed microsimulation models for six managed lane alternatives with different combinations of lane usage, speed limits, and left- and right-side operations. 3-D visualization videos were generated to compare the No-Build and Build scenarios to highlight key operational differences.
No Build
HOV 2+ Lane
Truck Lane