Hi, I work for Mapbox as their only southern hemisphere contractor based in Canberra.
Recently we begun a project to enhance our maps with highway shield images. Most of Australia has been fairly straightforward to develop shield selection rules for thanks to the alphanumeric system. However there are a states where no prefix is used with numeral only routes. Particularly Queensland (which has a mix of numeral and alphanumeric systems due to ongoing transition), the Northern Territory, and West Australia (which have not adopted the alphanumeric yet). In other states prefixes are used to separate National Highways (green and gold shields), National Routes (white shields) and State Routes (blue shields). Notably in Melbourne a "S xx" and West Australia a "Sxx" prefix is used for blue shield routes. Also in Tasmania "NH1" is used for the only non-alphanumeric route. For national consistency I would like to change all state routes in the Northern Territory and Queensland to use a "Sxx" prefix. Additionally in West Australia and Northern Territory to change all national highways to "NHxx" prefix. There is no use of a prefix currently anywhere for a national route, however changing the few remaining routes in West Australia, Northern Territory and Queensland to use a "NRxx" prefix would be useful. Finally I found state route 24 in Northern Territory is highway=trunk when at most it should be highway=primary to match the rest of the state. Also in Queensland national route 1 from Cairns heading out west is also trunk when at most it should be primary since it does not connect to a major city. I welcome any feedback or suggestions. Thanks, Leith Bade le...@mapbox.com
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