encyclopedia

AT GRADE

At natural ground level when describing transitways or streets; the intersecting transitways and streets are at the same elevation and actually intersect. (Grade crossings that are not separated.)

ATTAINMENT AREA

An area considered to have air quality that meets or exceeds the U.S Environmental Protection Agency (EPA) health standards used in the Clean Air Act. Nonattainment areas are areas considered not to have met these standards for designited pollutants. An…

ATTB

Advanced Technology Transit Bus – Development project in conjunction with Northrop Grumman aimed at incorporating recent technological advancements into the design of transit buses. The objective vehicles that meet specific goals to include mimimum cost, reduction in weight, reduction in…