PRELIMINARY INVESTIGATIONS

A Preliminary Investigation is performed to provide a comprehensive overview of historical and existing national research projects and practices. 

• View Preliminary Investigations

• Preliminary Investigation Form

RESEARCH TECHNICAL SUMMARIES

The research technical summary is a brief synopsis of a project's final report highlighting the study's result and implementation potential. 

• View Technical Summaries

RESEARCH FINAL REPORTS

Research Studies are complete when the results have been published in a final report that includes a thorough analysis of the objectives, methodology, results, and implementation potential.

• View Final Reports (2008 - Present)

• Archived Final Reports (1930-2007)

SEARCH DRI RESEARCH FINAL REPORTS AND TECHNICAL SUMMARIES

Loading This searches through Caltrans DRI Research Final Reports and Technical Summaries.

TRANSPORTATION RESEARCH DATABASES

• TRID - The TRIS and ITRD Database

• TRB Research in Progress (RiP)

• The National Transportation Library

• California State Library Catalog

• University of California MELVYL Catalog