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Document Library

This library is a collection of technical documents about the planning, development, and progress of the Link21 Program, including the Strategic Program Plan (SPP). The SPP is a living document that is updated biannually. More frequent updates will be provided, as necessary and appropriate, to document work and deliverables that have been finalized outside of the biannual update. 

The Link21 Team is committed to ensuring that information is available in appropriate formats to meet the requirements of persons with disabilities. If you require an alternative version of a file, please email

Business Case
Market Analysis
Strategic Advisory
Organization, Communication, and Governance
Stage Gate
Program Controls
Small and Disadvantaged Business Programs
Program Integration
Engagement and Outreach

Stakeholder Reports


Planning and Engineering
Travel Demand and Land Use (TDLU)

SPP Chapter 13: TDLU (document forthcoming)

The University of California Institute of Transportation Studies (UC ITS) is a network of faculty, research and administrative staff, and students dedicated to advancing the state of the art in transportation engineering, planning, and policy for the people of California. This study provides recommendations on the methodology and design specifications for the travel demand model to be built for the Link21 Program.