The National Traveler Information phone number that will provide local freeway, transit, rideshare, airport, general emergencey, and other traveler related services. 511 is targeted for deployment in Los Angeles County in 2010 and will ensure that our region complies with…
Category: Dictionary
A CAR
The odd numbered passenger vehicle of a dependant pair that carries the air compressor and Automatic Train Protection (ATP) equipment.
A-95
Circular A-95.
A-R-T
Art for Rapid Transit (Previously Art for Rail Transit.)
AA/DEIS
Alternatives Analysis/Draft Environmental Impact Statement. A detailed informational document that presents an analysis of all reasonable alternatives to resolve a transportation need, the probable environmental effects and mitigation measures for significant effects. Under federal law, the AA/DEIS was replaced with…
AADT
Annual average daily traffic.
AASHTO
American Association of State Highway and Transportation Officials.
AAWDT
Annual Average Weekday Traffic.
AB
Vehicle Type Code: Articulated buses
ABA
American Bus Association.
ABC
Activity Based Cost.
ABEND
An abnormal end to a computer job. An abend (a combining of two words, abnormal end, when operator messages were as short as possible) is an abnormal, rather than planned, end or termination of a computer program because of some…
ABS
Automatic block signal.
ABSOLUTE BLOCK
A block in which but one train is allowed at any time.
ABSOLUTE PERMISSIVE BLOCK
A block within which the movement of trains on a desigated section of track or tracks is directed by signals automatically controlled and without train-order authority and without superiority of trains.
ABSTRACT CHOICE MODEL
A model based on the assumption that it is not necessary to identify travel choice variables by the name of their mode, destination, time of day, or other characteristic; instead, they are identified by their attributes, for example, variables describing…
ACCEPTABLE QUALITY LEVEL
For a given quality characteristic, that minimum level of actual quality at which the material or construction can be considered fully acceptable.
ACCEPTANCE TESTING
Testing concerned with proving the effectiveness of new equipment prior to placing said equipment into operating service.
ACCESS BOARD
The U.S. Access Board is an independent Federal agency devoted to accessibility for people with disabilities. It is a leading source of information on accessible design
ACCESS CONTROL
The process by which access to resources of a computer system is limited or controlled. A logical or physical control designed to protect against unauthorized entry or use.