encyclopedia

PARAMETER

1. A measurable fixed characteristics of a sample or population. 2. An independent variable used in the development of mathematical models. (TRB)

PARATRANSIT

Flexible forms of transportation services that are not confined to a fixed route; usually used to provide service for people with disabilities in compliance with the Americans With Disabilities Act of 1990 (ADA).

PARCEL

A unit of real property that is usually identified by assessor’s number and by record of ownership in the Los Angeles County records.

PARK ‘N’ RIDE

A facility which provides parking for commuters who board bus or rail lines at that location. Sometimes called Park And Ride. The parking lot in this facility is called a Park And Ride Lot.

PARKING BRAKE

A manually applied hold brake used to prevent movement of the vehicle once it has stopped.

PARKING FACILITY

An area, which may be enclosed or open, attended or unattended, in which automobiles may be left, with or without payment of a fee, while the occupants of the automobile are using other facilities or services. (TRB)

PARKING TURNOVER

The ratio of the total number of parked vehicles accommodated during a given period in a specified area to the total number of parking spaces in that area. (TRB)

PARKWAY

An arterial highway for noncommercial traffic that has full or partial control of access. It is usually located within a park or a ribbon of parklike development. Certain types of traffic, such as truck or bus, may be prohibited from…

PART-TIME

An operator expected to perform work on less than a full-time employee workweek basis. Wages, benefits, and duration of work are typically different from those of full-time operators. (TRB)

PARTICULATE TRAP

A filter which removes a portion of the particulates (solids, soot, etc.) from a a vehicle’s exhaust stream and generally includes a regenerative unit and associated control system to burn the collected solids. (APTA)