underpass

n.

An underground tunnel or passage enabling pedestrians to cross a road or railway.

subway

n.

In British English, subway normally refers to a specially constructed underpass for pedestrians and/or cyclists beneath a road or railway, allowing them to reach the other side in safety.

This term was also used in the past in the United States, but is now used to refer to underground rapid transit systems.

crosswalk

n. American English

A path marked off on a street to indicate where pedestrians should cross.

zebra crossing

n. British English

A pedestrian crossing. So called because it is marked with white stripes.

intersection

n.

A place where two or more roads cross.

It is a road junction where two or more roads either meet or cross at grade (at the same level).

Also called a crossroads.

level crossing

n.

The intersection of a road and a railway.

Also called a railroad crossing, railway crossing, train crossing or grade crossing.

speed bump

n.

A speed bump (British English a speed or road hump, sometimes colloquially a sleeping policeman) is a traffic calming tool designed to slow traffic or reduce through traffic. A speed bump is a bump in a roadway that may be circular, parabolic, or sinusoidal, and it may have gaps near the curb to allow drainage. The speed at which a vehicle can safety pass a bump decreases with the bump's slope.