The proliferation of poorly located and closely spaced driveways, intersections, and traffic signals can impede a highway's ability to move traffic and to provide convenient access. Applying access management techniques will help manage these features and balance the competing demands for traffic mobility and land access.
In general, access categories are based on the function of the roadway. Standards are set for managing the frequency, location, and design of driveways, intersections, signals, medians, turn lanes, and other features. These standards are adjusted according to each access category - more restrictive on the lower class, less restrictive on the higher. The goal of access management is to protect the safety, capacity, and traffic flow on the highway system while providing access to adjacent property as appropriate and necessary.
ODOT has identified an access category for each roadway on the state system. The local ODOT Districts are responsible for assigning and maintaining the access inventories for their system. The local ODOT District can be contacted to determine the access category of a route.
State Highway Access Management Manual 2019-01-30.pdf