A road built to freeway standards.
A divided highway, especially one whose intersections and direct access to adjacent properties have been eliminated.
A road built for high speed traffic, but not up to motorway standards or designated a motorway.
An underground route for pipes, sewers, etc.
A rapid transit system, regardless of the elevation of its right of way; a metro system.
An underground railway, especially for mass transit of people in urban areas.
A train that runs on such an underground railway.
An underground walkway, tunnel for pedestrians (called pedestrian underpass in US).
To travel by underground railway.