Road Assets and Mileage

As of 2021, the Straightline Charts are no longer being updated. Instead we direct you to the State Highway Inventory Reports which are updated on a monthly basis and provide a more accurate illustration of the highway data. These tabular reports will give you access to more current information than the Straightline Charts were able to provide. Links to the State Highway Inventory Reports and instructions for their use are provided below.

We will keep the current charts posted online until June 30, 2023 at which time they will be removed from the web page.

A Straightline Chart is a lineal representation of the features along a state highway. Intersecting roadways, as well as culverts, rivers, bridges, city limits, state parks, viewpoints and many other features are shown by milepoint along the Straightline Chart ribbon. There are also interchange diagrams for each connection and frontage road along the highway with their features noted by milepoint. These charts can be used as a quick reference to locate an attribute along a state highway, connection or frontage road.

Supporting Documents

• State Highway Inventory Reports
• Instructions for use of the State Highway Inventory Reports
• Straightline Chart Update Index
• Straightline Chart Legend
• Cross Reference Table - Highway Route Number to State Highway Number

TransInfo is the official ODOT data source for the State Highway network and is used to tabulate the official State mileage. It also carries 90 plus associated assets. Information available includes Road Geometry, Bike and Pedestrian assets, Classifications like Federal Functional Class or National Highway System (NHS), Intersecting Roads, and many others.

The TransInfo Data Dictionary will help you learn more about the assets available from TransInfo that reside on the State Highway Network. It provides a description of each asset and its associated attributes, as well as possible values for those attributes. It works best in Edge or Chrome.

TI Data Dictionary