The Digital Road Map Database (DRM Database) is the standard national digital road map database supporting Japanese ITS infrastructures. This database consists of digital cartographic data in which locations and other information are expressed in numeric form, so that computers can recognize roads, intersections and so on. The DRM Database allows car navigation systems and the like to display road maps on their screens and search for the suitable route to a destination avoiding traffic congestion. The Japan Digital Road Map Associaton (DRM Associaton) creates, updates and provides the DRM Database based on public-private collaboration.