California Department of Transportation

Corridor System Management Plans Update


Caltrans District 3 (D3) started the process to update the Interstate 80/State Route 51, Highway 50, and State Route 49 CSMPs this fiscal year, with an anticipated completion date of June 2012.  The remaining three CSMPs, which include State Route 99/Interstate 5, State Route 99 - Chico, and State Route 65, will be updated next fiscal year.  The purpose of the CSMP update is to continue with the momentum from the first generation document to achieve a seamless transportation system by renewing the baseline and forecast travel data, modifying the performance measures to include additional transit and bicycle measures not included in the original CSMPs, and upgrading and prioritizing the key capital projects lists with an emphasis on inclusion of Intelligent Transportation Systems (ITS) and Traffic Operational System (TOS) improvements.


  • The lists of Key Capital Projects contained in each CSMP are out-dated.
    • Most of the projects identified in each CSMP that were funded by the CMIA and Highway 99 Bond Programs have been constructed or are currently in construction.
    • Some of the remaining projects in the key projects list included in most CSMPs are not completely consistent with the current Metropolitan and Regional Transportation Plans that have since been adopted.
  • Projects that yield a high Benefit to Cost ratio such as TOS projects and ITS projects need to be added to the Key Capital Projects lists.
    • There is now a heightened focus on the development, implementation, and use of system and operational management strategies to facilitate efficient and effective transportation network use.  These strategies include TOS projects such as ramp metering, auxiliary lanes, transition lanes, bus/carpool (a.k.a. HOV) lanes, and short mixed flow lane extensions, and ITS projects such as Closed Circuit Television Systems, Changeable Message Signs, Blue Tooth Readers, Highway Advisory Radio, and Traffic Monitoring Stations. 
    • Benefit/Cost Analysis of ITS and TOS projects typically yield a higher performance ratio than large capacity expansion projects.
  • Performance Measures for bicycles and transit facilities are non-existent or need to be modified.
    • The 2009 CSMPs did not identify performance measures for bicycles, but left a “place holder” for future assignment.
    • The one measure for transit (Available Seating Capacity) has been difficult to monitor. 
  • Projects in the Key Capital Projects Lists for most CSMPs were prioritized.
  • Caltrans TCRs for non CSMP segments of I-80, US 50, and SR 49 are currently being updated; to help ensure internal consistency between Planning documents, both the TCRs and CSMPs should be updated at the same time for the same corridor.
  • Due to the changes that have occurred since the 2009 CSMPs approval,  there is a need to update existing travel conditions, corridor performance measures and strategies, and proposed capital improvements for each CSMP Corridor. 

The Work Plan for the update of the CSMPs includes the following tasks:

  • Kick-off meetings with SACOG Rural Planning Partnership and applicable Regional Transportation Planning Agency (RTPA) Technical Advisory Committees (stakeholders) to announce the Update and to request their involvement in this Update process;
  • Correspondence with partner cities, counties, RTPAs, Metropolitan Planning Organizations, and other special interest groups (stakeholders) requesting participation in the this Update process;
  • Prepare new CSMP Transportation Network (State Highways, parallel/connecting roadways, and transit and bike routes)  base maps and tables;
  • Prepare new project tables by transportation mode for existing programmed, planned, and conceptual projects;
  • Inventory existing ITS/ TOS elements and update ITS/TOS maps and tables by transportation mode;
  • Identify current and forecast traffic data and identify challenges by transportation mode;
  • Update Performance Measures list for each mode and baseline service calculations for the performance measures;
  • Update key corridor improvements projects;
  • Prepare draft CSMP and circulate for internal and external stakeholder comments; and
  • Complete Final CSMP update, secure approval by the District Director, and distribute approved CSMP Updates to stakeholders.

Several plans and studies are presently being conducted to identify needed TOS and ITS improvements that will be incorporated into the updated CSMPs.  These plans and studies are as follows:

District 3 ITS/Operational Improvement Plan:  This Plan will identify and prioritize new TOS and ITS projects for urban highway corridors within District 3.  The Plan will provide a unified document that can be used by all District Divisions, and local and regional agencies for programming and deployment of identified projects in the Plan.

SR-51 Preliminary Investigation (PI) Plan:  This PI identifies and prioritizes needed TOS and ITS improvement projects along SR-51 from US-50 to I-80, including bus/carpool and auxiliary lanes, and widening of the American River Bridge.  The PI will includes a project delivery phasing plan that identifies and ranks the priority of key capital projects, which will be incorporated into the Key Capital Projects lists for the I-80/SR 51 CSMP. To view the finalized PI, please click on the following link: "SR 51 PI"

I-80/US-50 Davis to Downtown Sacramento Feasibility Study:  This Study will identify and analyze different congestion relief and mobility enhancement scenarios on I-80 from the Solano/Yolo County line to US-50 and on US-50 from I-80 to the Yolo/Sacramento County line. Some of the projects that will be analyzed include bus/carpool lanes, auxiliary lanes, mix flow lanes and ramp meters.  Once a preferred scenario is selected, a phasing plan that identifies and ranks the priority of Key Capital Projects will be developed.  When completed, the identified projects will be incorporated into the Key Capital Projects lists for the I-80/SR 51 and US 50 CSMPs.

This web page will be updated periodically with new CSMP Update report information once available.  For additional CSMP Update information by corridor, please click on the links below.

I-80/SR 51 CSMP Update
Existing Transportation Network spreadsheet and map
Proposed Transportation Network spreadsheet and map

SR 49 CSMP Update
Transportation Network spreadsheet and map

US 50 CSMP Update
Existing Transportation Network spreadsheet and map
Proposed Transportation Network spreadsheet and map

For further information about the CSMP Update, please contact Rick Helman, by E-mail or phone at (530) 634-7616