encyclopedia

DES

Data Encryption Standard. A standardized encryption technique that allows binary code to be scrambled into an undetectable stream of bits for transmission over a public network.

DESCRIPTIVE LITERATURE

Information such as catalog cuts, illustrations, drawings, and brochures which show the characteristics of construction of a project or explain its operation. The Descriptive Literature may be furnished by a Bidder or Offeror as part of its Bid to describe…

DESIGN BUILD

A construction project delivery system in which the design and construction aspects of a project are contracted for with a single entity known as the design-builder or design-build contractor. This system is used to minimize project risk for an owner…

DESIGN CAPACITY

1. For highways, the maximum number of vehicles that can pass over a given section of a lane or roadway in one or both directions during a given time period under prevailing environment (e.g., weather, light), roadway, and traffic conditions.…

DESIGN HOURLY VOLUME (DHV)

The amount of traffic a transportation facility is designed to carry in 1 hr. (TRB)

DESIGN-BUILD-FINANCE-OPERATE-MAINTAIN

A project delivery system in which the design, construction, financing, operations, and maintenance of the project are awarded to a single entity. This is a type of public-private partnership (P3) concession.

DESIGNATED RECIPIENT

A public body, designated in each urban area, that must have the legal authority to receive and dispense federal funds. (TRB)

DESIRE LINE

A straight line on a map that connects the origin and destination of a trip (theoretically, the ideal or most desirable route) and may indicate by its width or density the volume of trips between that origin and destination. (TRB)

DESTINATION

1. The point at which a trip terminates. 2. In planning, the zone in which a trip ends. (TRB)