encyclopedia

LOW PLATFORM

A platform at or near the top of the running surface of the transit unit (vehicle or train), requiring the passenger to use steps to board and alight. (TRB)

LOW RAIL (INSIDE RAIL)

The inner rail of a curve that has at-grade alignment, whereas the opposite or outer rail is elevated. (TRB)

LOW VOLTAGE

In rail transportation, the voltage used for most auxiliary systems (e.g., illumination, fans, public address systems), usually 24 or 72 volts direct current or 110-240 volt alternating current. (TRB)

LOW-BID PROCUREMENT

A bid that is awarded to the lowest responsive and responsible bidder.

LOW-CAPITAL TRANSPORTATION IMPROVEMENTS (LCT)

A group of transportation improvements, designed to increase the usefulness of existing transportation facilities, that generally cost less and can be implemented more quickly than system development action; see also Transportation System Management (TSM). (TRB)