L
Level of Service: An indicator of service quality, which may account for average speed, service frequency, reliability, and/or hours of operation.
 
Light Rail (FTA): Lightweight passenger rail cars operating singly (or in short, usually two-car, trains) on fixed rails in right-of-way that is not separated from other traffic for much of the way. Light rail vehicles are driven electrically with power being drawn from an overhead electric line via a trolley or a pantograph. Also known as "streetcar," "tramway," or "trolley car."
 
Linehaul Service: Provides high-speed service along a fixed transit route.