and visibility signage. B roads are the primary transport links for regions not connected by either M or A roads, as well as major tourist routes, such as the Great Ocean Road (route number B100). C Roads are generally sealed two lane roads with shoulders and serve as links between population centres and the major road network. For example, the Mount Dandenong Tourist Road is route number C415. The Victorian road numbering system is based on a 'ring and spoke' system. The 'ring' highways (highways that circle Victoria) numbers are given in the multiple of hundreds e.g. Henty Highway (200), Murray Valley Highway (400) and Great Alpine Road (500) make the outermost ring. Midland Highway (300) and Maroondah Highway (300) is the inner ring. The spokes generally incorporate National Route numbers. Otherwise, east-west aligned highways are given even numbers and north-south are given odd numbers. Highways and primary roads are given numbers in multiple of tens. Other roads are given other numbers that indicate general alignment. Essentially, for freeways and arterial roads, of which VicRoads is the coordinating authority, the letter drawn from the quality and purpose of the route is added to the number as determined by the ring and spoke system to give a highway number that reflects the quality and alignment of the road. Legislation and governance The prime transport statute in Victoria is the Transport Integration Act 2010. The Act establishes and sets the charters of the state agencies charged with integrating and coordinating the state's transport system and, as part of that activity, providing roads, managing network access and providing registration and licensing services. The Act establishes the Department of Transport as the agency responsible for the overall integration and planning of Victoria's transport system. In addition, the Act creates Victoria's key road agency, the Roads Corporation or VicRoads. An important road regulation statute is the Road Management Act 2004, which regulates the management of Victoria's road network. The key statute that regulates Victoria's road safety is the Road Safety Act 1986. Responsibility for road maintenance in Victoria is distributed. VicRoads maintains main roads, including secondary roads, while local government councils maintain local roads. There are also private roads. The federal government takes its own interest in national highways, and other roads of national interest, such as those that impact foreign trade. See also Driver's licence in Australia Rail transport in Victoria Road transport in