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).

2015 ITSP