Average Daily Traffic. Estimates and counts done in order to evaluate the amount of existing traffic at a certain point. These counts are usually done within a controlled time-period (i.e. 24-hour counts, 36-hour counts, etc.).
Average Daily Traffic. the average daily traffic count is used as a method to determine how many vehicles travel on a road on a given day. This enables traffic planners to prioritize projects by comparing traffic counts to determine relative need. See also "level of service."
abstract data type. an interface and its associated expected behavior, usually implemented as an object containing some data (the internal representation) and a set of methods implementing the interface
Abstract Data Type. A mathematical formalism for defining the characteristics of a certain data type, without revealing the underlying model, let alone any concrete implementation in a computer program. An ADT defines exactly what is required of an implementation, and, by omission, also what is not required.