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Carnarvon Developmental Road
Queensland – New South Wales
|Length||696 km (432 mi)|
|Route number(s)|| A7
Rolleston - Roma
Roma - St George
National Route 46
St George - Qld/NSW border
Qld/NSW border - Moree
|National Route 55|
|North end||Dawson Highway (A7 / State Route 60), Rolleston, Queensland|
| Warrego Highway (National Highway A2)
Moonie Highway (State Route 49)
Balonne Highway (State Route 49)
Castlereagh Highway (A55)
Barwon Highway (State Route 85)
|South end|| Newell Highway (A39) /
Gwydir Highway (B76),
Moree, New South Wales
|Major settlements||Injune, Roma, Surat, St George, Mungindi|
The Carnarvon Highway is a state highway of Queensland, Australia, linking Moree south of the NSW/QLD border, via the town of St George, eventually to the township of Rolleston. North of Roma it is known as the Carnarvon Developmental Road. National Route 46 runs from Moree to St George. The A7 then continues north from St George to Rolleston, which continues along the Dawson Highway and Gregory Highway to Emerald and Charters Towers.
It is the main access road to the Carnarvon National Park.
National Route 55 (NR55) was a former north-south route through central northern New South Wales and central Queensland, connecting the Newell Highway at Gilgandra with Walgett, St George, Roma, Emerald and Charters Towers. The highway was a strategic route to take B-doubles and other large vehicles (which cannot use the Bruce Highway) to the Queensland ports north of Rockhampton.
Today, NR55 only covers 340 kilometres (210 mi) of the Castlereagh Highway, having been replaced by the alpha-numeric designation A55 within Queensland during 2004. A7 has now replaced the NR55 route of the Carnarvon Highway between Rolleston and St George. National Route 46, newly signposted, now extends from St George to Moree.
NR55 signs were first erected in New South Wales between Gilgandra and Walgett. It had then been extended from Walgett to the Queensland border at Hebel, in the late 1970s - where it originally terminated.
This is where for many years there was an oddity between (Connor Lines) the Queensland and New South Wales interpretation of the path that NR55 would take. It created the situation where the southern end of route NR55 (Carnarvon Highway) was located over 100 kilometres (62 mi) west from the northern end of route NR55 (Castlereagh Highway).
Eventually, NR55 was taken as an extension of the Castlereagh Highway between the Queenland/New South Wales border and St George. With the change in alphanumeric route numbering in the mid-2000s, NR55 runs between St George and Roma as A55, and was replaced with National Route 46 between St George and Moree, and the A7 between Roma and Rolleston.
List of towns on the Carnarvon Highway
- Highways in Australia
- List of highways in Queensland
- List of highways in New South Wales
- Mungindi Bridge