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The New Zealand state highway network is the major national highway network in New Zealand. Nearly 100 roads in the North and South Islands are state highways. All state highways are administered by the NZ Transport Agency. The highways were originally designated using a two-tier system, national (SH 1 to 8) and provincial, with national highways having a higher standard and funding priorities. Now all are state highways, and the network consists of SH 1 running the length of both islands, SH 2 to 5 and 10 to 58 in the North Island, and SH 6 to 8 and 60 to 99 in the South Island, numbered approximately north to south. State highways are marked by red shield-shaped signs with white numbering (shields for the former provincial highways were blue). Road maps usually number state highways in this fashion. Only two percent of the network is composed of dual-carriageway motorways with grade-separated access, but they carry ten percent of all New Zealand traffic. The majority of the state highway network is made up of single-carriageway roads with one lane each way and at-grade access. ==History == In the early days all roads were managed by local road boards. The idea of a national network of highways did not emerge until the early twentieth century, when a series of pieces of legislation was passed to allow for the designation of main highways (in 1922) and state highways (in 1936). This saw the National Roads Board, an arm of the Ministry of Works, responsible for the state highway network. From 1989 to 2008, state highways were the responsibility of Transit New Zealand, a Crown entity. In 1996 the funding of the network was removed from the operational functions with the creation of Transfund New Zealand, which then merged with the Land Transport Safety Authority to create Land Transport New Zealand. That was done to ensure that funding of state highways was considered on a similar basis to funding for local roads and regional council subsidised public transport. In August 2008, Transit and Land Transport NZ merged to become the NZ Transport Agency. Every five years the NZ Transport Agency will embark on a state highway review to consider whether the existing network should be expanded or reduced, according to traffic flows, changes in industry, tourism and development. Highways around Tauranga and in the Napier/Hastings region have undergone major changes in recent years. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「New Zealand state highway network」の詳細全文を読む スポンサード リンク
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