End of a heavy rail vehicle that does not contain the train operator’s cab.
encyclopedia
RADIAL HIGHWAY
Highway, Radial.
RADIAL SERVICE
Local or express service designed primarily to connect the Central Business District with outlying areas. Also called a pulse system.
RADIO CONTROL HEAD
The controlling device, rectangular in shape, equiped with channel selector, TX light, volume control and SAS. light.
RADIO HANDSET
A device similar in appearance to a telephone, equiped with a push to talk (PTT) button which must be pressed to transmit.
RADIO-CONTROLLED ENGINE (SLAVE UNIT)
In passenger trains, an unmanned propulsive unit within a train that is separated by rail cars from the lead unit but controlled from it by radio signals. (TRB)
RADIUS OF CURVATURE
A rating of the severity of a curve by comparing it to an arc of a circle of stated radius. (TRB)
RAIL
The longitudinal steel beams of the track structure upon which railroad wheels run. Rail is designated by weight per yard of length.
RAIL – INSULATED JOINT
A rail joint in which electrical insulation is provided between adjoining rails. Also see Insulated Rail Joint. (NTSC)
RAIL ANCHOR (ANTICREEPER)
A track device for ballasted track designed to prevent longitudinal rail movement (creep) caused by factors such as traffic or temperature variations. (TRB)