Freeway access is a term used to describe the ability of vehicles to enter and exit a freeway. The two most common methods of freeway access are ramps and onramps. A RAMP is a short, sloped roadway that connects two roads at different elevations, allowing vehicles to transition from one road to the other. An onramp is a roadway that connects a surface street to a freeway, allowing vehicles to enter the freeway from the surface street.