encyclopedia

AIR CUSHION TRANSPORTATION SYSTEM

A surface transportation system that uses vehicles that are supported by a thin layer (cushion) of air. (TRB)

AIR CUSHION VEHICLE

Also called ACV and ground effect machine. Any vehicle supported by a cushion of air.

AIR POLLUTION

The presence of unwanted material in the air in sufficient amount and under such circumstances as to interfere significantly with human comfort, or welfare, or with full use and enjoyment of property. (TRB)

AIR QUALITY INDEX

A measure of the total wieght of mobile source pollutant emissions (carbon monodixe, oxides of nitrogen, and reactive organic gases) from transportation modes. Both the emission factors and the formula that enables the composite index to be calculated are provided…

AIR QUALITY MANAGEMENT DISTRICT (AQMD)

The South Coast AQMD has authority for control of emissions from stationary sources within the Los Angeles region. The control includes restrictions on use of paints and solvents by site. Through extension of the agency’s on-site emission control. The SCAQMD…

AIR QUALITY MANAGEMENT PLAN (AQMP)

Air Quality Management Plan. Plan that focuses on setting forth a comprehensive program that will lead into compliance with all federal and state air quality standards. This program requires the cooperation of all levels of government: local, regional, state, and…

AIR RIGHTS

The right to the use of air space over property owned by another. Often air rights are granted for buildings or other uses above or below transportation facilities. (TRB)