Warning devices refer to signs, signals, markings, and devices placed along highways approaching and at railroad/highway crossings on, over or adjacent to a street or highway used to direct and assist vehicle operators and pedestrians in crossing the rail line safely.

Active Warning Devices:

Bell - A device which, when activated, provides an audible warning for pedestrians and bicyclists, which may be used with a flashing light signal.
Cantilever - A structure, which may have flashing light signals, extending over one or more lanes of vehicular traffic.
Flashing Red Light Signal - A device installed on a standard mast or cantilever which, when activated, displays red lights flashing alternately. It indicates the approach of a train and requires a complete stop by the highway user.