Biennial Reports Biennial reports chronicled the work of the agency duringa given biennium. Early reports were very detailed, often discussing individual projects and work being done by county. They also showed the evolution of the agency, and the decisions and legislation that brought changes about. These reports are available in hard-copy format from the ODOT Library, but a few have been digitized, including the first, published in 1914 as an annual report. Some of the links below open to State Library of Oregon records which allow a PDF to be downloaded. First annual report of the Highway Engineer, for the period ending November 30,1914 
This page contains electronic copies of some of the documents and publications that outline the history of the state highway system and the Department of Transportation. Hard copies of most of these items, as well as otherhistoric resources,are available through the ODOT Library.
Other biennial reports have been digitized by Internet Archive as part of an FHWA pooled fund projects. They can be viewed here.
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Casual and Factual Glimpses at the Beginning and Development of Oregon's Roads and Highways
This folksy account of the history of the state highway system was written in the 1950s by Ralph Watson, Public Relations Consultant for the Highway Department.
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Oregon On the Move: A History of Oregon's Transportation Systems
The ODOT History Committee published this chronological listing of major developments in the agency's history in 2009.
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History of State Highways in Oregon
This electronic-onlydocumentis produced by the ODOT Right-of-WayUnit, and was last updated in January, 2017.Itis a guide to the source materials forthe background and history of individualstate highways, including information from theright-of-way files,agreements and resolutions,Commission minutes, History Center files, and other resources. The document alsooffers electronicmaps, including digitized versions of the county Market Road maps, and the Biennial Report maps.
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The Interstate Highway System in Oregon
Published in 2004, this document offers an historic overview of Oregon's interstate highway system. It was prepared by historianGeorge Kramer for the Oregon Department of Transportation.
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This collection includes the Via and Transcript newsletters published 1976-2003. Digitization was done by Internet Archives as part of a pooled fund study.
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State HighwayMaps
The State Library of Oregon has made the collection of Oregon State Highway Maps digitized by the ODOT GIS Unitavailable to the public. Maps span from 1919-2003.
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Podcasts
The Oregon Department of Transportation's Geo-Environmental Section has produced podcasts to share knowledge about Oregon's rich history and diverse environment.
Bridges and Ferries
Oregon's Historic Bridge Field Guide.
Produced in2013 by members of ODOT's Bridge Preservation and Cultural Resources teams, this publication updates an earlierdocument produced by the agency in the1980s: Historic Highway Bridgesof Oregon.
This Bridge Unit brochure shows the major bridges along Highway 101, many of which were designed by Conde McCullough, Oregon's master bridge builder.
Map Showing Location of Automobile Ferries in the State of Oregon: March 1, 1935
The five major coastal bridges forming the last links in the Oregon Coast Highwaywere dedicatedin 1936. This 1935 map was created as the bridges were being constructed, and the stateoffered free ferry service across these expanses until the bridges opened to automobile traffic.
