Interregional Transportation Strategic Plan
The Interregional Transportation Strategic Plan (ITSP) is a statewide planning document that provides guidance and prioritization through interregional corridor analysis for projects focused on improving travel access for people and goods on the State's Interregional Transportation System in a safe, equitable, sustainable, multi-modal manner.
Caltrans prepared the first ITSP in 1998 in response to Senate Bill 45 (1997), which dedicates 25% of State Transportation Improvement Program (STIP) funding to interregional highway and passenger rail facilities. The Caltrans controlled portion of the interregional improvement funds is programmed in the Interregional Transportation Improvement Program (ITIP).
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2021 ITSP
The Interregional Transportation Strategic Plan (ITSP) provides direction to programs, districts, and partner agencies on the policies and strategies that should be considered when assessing the interregional transportation system and identifying improvements. The ITSP also provides policy direction for the development of the Interregional Transportation Improvement Program (ITIP).
- 2021 Interregional Transportation Strategic Plan - October 4, 2021 (PDF)
- Please visit our Caltrans ITSP 2021 Website to view stakeholder and public workshop videos and materials.
- 2015 Interregional Transportation Strategic Plan (PDF)
- 2015 ITSP Fact Sheet (available upon request)