encyclopedia

LICENSE PLATE SURVEY

A survey in which license plate numbers of vehicles at one point are tabulated and compared with a similar listing at another point. It may also be used to establish approximate trip origin by identifying the registration address from motor…

LIFE CYCLE

The acquisition and operations stages of a system’s evolution. The phases of development of a system typically include the concept, design, development, and deposition efforts. (NTSC)

LIFE CYCLE COSTING

A method of evaluation of alternative choices (e.g., vehicles) on the basis of comparative total costs for purchase and operations over the expected useful life of the asset. (TRB)

LIFE-CYCLE PROCUREMENT

A form of competitive procurement where the contract is awarded based on a consideration of cost of operation as well as initial capital cost.

LIGHT RAIL

Lightweight passeger rail cars operating on fixed rails in right-of-way that is not separated from other traffic for much of the way. Light rail vehicles are driven electronically with power drawn from an overhead electric line (catenary). Modern-day term for…

LIGHT RAIL RAPID TRANSIT SYSTEM (LRRT)

Light rail transit with exclusive, grade-separated right-of-way for the entire system. It may have low- or high-level platforms and visual or signal control. (TRB)

LIGHT RAIL VEHICLE (LRV)

Electrically-propelled passenger carrying rail vehicle.

LIMIT LINE

A line painted on the pavement just prior to a crosswalk before which a vehicle must stop.

LIMITED ACCESS (CONTROLLED ACCESS)

In transportation, to have entry and exit limited to predetermined points, as with rail rapid transit or freeways. (TRB)

LIMITED CONTROLLED ACCESS

In transportation, to have entry and exit limited to predetermined points, as with rail rapid transit or freeways.