computer software for use with a vehicular highway traffic simulation system, said software providing a graphical user interface permitting users to specify input data required to simulate traffic operations on a given highway network and including an interface to Geographic Information System (GIS) and Computer-Aided Design (CAD) databases to permit importation of geometric data defining the layout of a highway network

computer software diskettes featuring a data input module to be used with other programs and users's manuals distributed therewith