Studies and Access Management
Information on interchange justification and modification studies, access variance approvals, the access management program, and more.
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Interchanges
Learn more about interchanges used to manage traffic along limited access highways.
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Interchange Studies
Access information on Interchange Justification Studies (IJS), Interchange Modification Studies (IMS), and Interchange Operations Studies (IOS).
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ODOT Analysis and Traffic Simulation (OATS) Manual
Download the OATS manual and access additional support materials.
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State Highway Access Management Manual (SHAMM)
The SHAMM establishes procedures and standards to protect the utility, function, capacity, and safety of the state highway system.