The condition existing where the right of owners, or occupants of abutting land, or other persons, to access in connection with a highway is fully or partially controlled by public authority. There are two major varieties of controlled access: fully-controlled and partially controlled.

1. Fully-controlled access (full control of access) - the authority is exercised to give preference to thru traffic by providing (access) connections with selected public roads only, and by prohibiting crossings at grade or direct connection to private driveways.
2. Partially-controlled access (partial control of access) - the authority is exercised to give preference to thru traffic to a degree that there may be, in addition to (access) connections with selected public roads, some crossings at grade and connections to private driveways.