What are the two types of railroad crossing warning devices?

Active Grade Crossings have active warning and control devices such as bells, flashing lights, and gates, in addition to passive warning devices such as crossbucks (the familiar x-shaped signs that mean yield to the train), yield or stop signs and pavement markings.



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The advance warning sign is a round, yellow sign bearing the lettering RXR. The X is very large, covering the full diameter of the sign. It is usually the first warning you will see that you are approaching a railroad crossing. Slow down, look and listen for an approaching train.

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Identification of a railroad crossing can be done by using two major types of railroad crossing signage: Passive signs - Signs that alert motorists that they are approaching a highway-rail grade crossing. Advance Warning Signs: A public highway-rail crossing must be identified with a round, yellow advance warning sign.

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Active Grade Crossings have active warning and control devices such as bells, flashing lights, and gates, in addition to passive warning devices such as crossbucks (the familiar x-shaped signs that mean yield to the train), yield or stop signs and pavement markings.

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What Vehicles Must Stop At Railway Crossings?
  • School Buses. A school bus must stop if the driver sees a red light or hears an audible bell at all railroad crossings, regardless of whether crossbucks mark the crossing or not. ...
  • Commercial Motor Vehicles Transporting Passengers. ...
  • Vehicles Carrying Flammable Materials.


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A passive crossing is one that does not have flashing lights or automatic gates. The crossbuck sign, the white X sign, is a regulatory sign that means Yield. Crossbuck signs are required at all public railroad crossings. The railroad companies install and maintain crossbuck signs.

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If there is more than one track, that sign will be present. After one train has passed, look and listen in case another train is coming from either direction. STOP and YIELD signs at the crossing have the same meaning as they do at other intersections.

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The term level crossing (also called a railroad crossing, a road through railroad, railway crossing, train crossing or grade crossing) is a crossing on one level (at-grade intersection) - without recourse to a bridge or tunnel - of a railway line by a road, path, or another railroad.

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At most crossings, the signals will activate about 30 seconds before the train arrives but there are sensors measuring speed so that the crossing knows when to activate; so, the slower the train is, the longer the delay and the faster the train is, the earlier the crossing activates.

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