Statistics:

Length:
343 km
Termini:
Northern: QLD Border, Angledool
Southern: Oxley Hwy (NR34) and Newell Hwy (NH39), Gilgandra
Miscellaneous:
Continues as A55 in Queensland
Suburbs, Towns & Localities Along Route:
Gilgandra, Curban, Armatree, Gulargambone, Combara, Coonamble, Wingadee, Walgett, Lightning Ridge and Angledool

Route Numbering:

Current: B55
Former: 55
Multiplexed with: 37
Road Authority Internal Classification: 1
HW18

General Information:

National Route 55 was a rural highway linking the New South Wales western plains with southern Queensland. The road is undivided along its entire length.

The highway named after the Castlereagh River, which runs parallel with the highway.

Multiplexes along the route include:
National Route 37, for 4 km, Walgett.

History:

18 July 1814: Work commenced on the road. The following year Governor Macquarie, his wife and official party travelled the brand new road, which eventually led to more waterways and open country discovered by European settlers. 2
1969: Work begins to finish the bituminous sealing of the highway. 3
2013: National Route 55 replaced by B55.

Gilgandra to QLD Border

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Advance Directional Sign:

AD sign on Oxley Hwy (NR34) approaching Castlereagh Hwy (NR55) at Gilgandra, November 2010.

Image © Rob Tilley

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Black Intersection Directional Sign:

Black ID sign on the corner of Oxley Hwy (NR34) and Castlereagh Hwy (NR55) at Gilgandra, May 2005.

Image © Rob Tilley

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Gilgandra Town Centre:

Castlereagh Hwy (NR55) as it passes through the Gilgandra town centre, July 2006.

Image © Paul Rands

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Black Distance Sign:

Black reassurance directional sign as the Castlereagh Hwy (NR55) leaves Gilgandra, December 2002.

Image © Michael Greenslade

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Black Intersection Directional Sign:

Black ID sign at the corner of Castlereagh Hwy (NR55) and King St, Coonamble, December 2003.

Image © Michael Greenslade

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Advance Directional Sign:

AD sign at Coonamble approaching Aberford St and Castlereagh St, December 2003.

Image © Michael Greenslade

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Black Intersection Directional Sign:

Black ID sign at the corner of Castlereagh Hwy (NR55) Kamilaroi Hwy (NR37) and Wee Waa St, December 2003. This sign pre-dates the introduction of NR37.

Image © Michael Greenslade

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Horses Sign:

Sign that is common to the more isolated areas of the state asking motorists to stop and wait for horses if on the bridge, Namoi River at Walgett, October 2010.

Image © Paul Rands

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Intersection Directional Sign:

ID sign assembly at the end of the NR37 duplex in Walgett, October 2010. NR55 continues straight ahead at this junction. Note the missing NR37 shield.

Image © Paul Rands

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Distance Sign:

RD sign as Castlereagh Hwy (NR55) leaves Walgett, December 2003.

Image © Michael Greenslade

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Barwon River:

Castlereagh Hwy (NR55) as it crosses the Barwon River near Walgett, October 2005.

Image © Paul Rands

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Black Advance Directional Sign:

Black AD sign on Castlereagh Hwy (NR55) approaching Gwydir Hwy (NR38), October 2005.

Image © Paul Rands

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Reassurance Directional Sign:

Distance sign at Walgett, December 2003. Note the missing route number.

Image © Michael Greenslade

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Black Intersection Directional Sign:

Black ID sign at the corner of Castlereagh Hwy (NR55) and Llanillo Rd at Lightning Ridge, December 2003.

Image © Michael Greenslade

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Reassurance Directional Sign:

Distance sign at Lightning Ridge, December 2003. Note the missing route number.

Image © Michael Greenslade

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Supplemental Advance Directional Sign:

Supplemental AD sign on Castlereagh Hwy (NR55) approaching Bill O'Brien Way at Lightning Ridge, October 2005.

Image © Paul Rands

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Black Advance Directional Sign:

Black AD sign at Lightning Ridge approaching Bill O'Brien Way, December 2003. This sign pre-dates the extension of NR55 to the NSW / QLD Border.

Image © Michael Greenslade

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No Fuel Next 63 km:

Sign on Castlereagh Hwy (NR55) at Lightning Ridge indicating distance to the next available fuel, October 2005.

Image © Paul Rands

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Advance Directional Sign:

AD sign at Angledool approaching Goodooga Rd, October 2005.

Image © Paul Rands

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Black Kilometre Plate:

Black kilometre plate near the NSW / QLD Border at Angledool, December 2003.

Image © Michael Greenslade

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NSW-QLD Border:

Castlereagh Hwy (NR55) at the border with Queensland, October 2005. NR55 ends here and becomes A55.

Image © Paul Rands

QLD Border to Gilgandra

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NSW-QLD Border:

Castlereagh Hwy as it crosses from Queensland into New South Wales at Angledool, December 2003. A55 becomes NR55 at this location.

Image © Michael Greenslade

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Intersection Directional Sign:

ID signs facing Bill O'Brien Way at Lightning Ridge, October 2005. Note the incorrect SR shield on the top sign and the alphanumeric route number on the bottom sign.

Image © Paul Rands

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110 km/h Zone:

The 110 km/h zone along Castlereagh Hwy (NR55) at Lightning Ridge, October 2005. This speed zone is uncommon away from the state's freeways.

Image © Paul Rands

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Advance Directional Sign:

AD sign at Walgett approaching Gwydir Hwy (NR83), December 2003.

Image © Michael Greenslade

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Dust Sign:

Sign requesting truck drivers to stop at the bay beyond the sign to drop dust from their vehicles before entering the town centre, Walgett, October 2010.

Image © Paul Rands

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Reassurance Directional Sign:

Distance sign at Walgett, December 2003.

Image © Michael Greenslade

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Advance Directional Sign:

AD sign at Coonamble approaching Aberford St and Castlereagh St, December 2003.

Image © Michael Greenslade

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Gilgandra:

Castlereagh Hwy (NR55) as it passes through the town of Gilgandra, April 2012.

Image © Paul Rands

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Black Advance Directional Sign:

Black AD sign on Oxley Hwy (NR34) approaching Castlereagh Hwy (Miller St) at Gilgandra. May 2005.

Image © Rob Tilley

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Black Intersection Directional Sign:

Signage on the junction with the Castlereagh & Oxley Highways at Gilgandra. May 2005.

Image © Rob Tilley

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Black Advance Directional Sign:

Black AD sign on Castlereagh Hwy (Miller St) (NR55) approaching the Oxley Highway (Warren Rd) (NR34) at Gilgandra. May 2005.

Image © Rob Tilley

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Advance Directional Sign:

AD sign on Castlereagh Hwy (Miller St) (NR55) approaching the Oxley Highway (Warren Rd) (NR34) at Gilgandra. April 2012. Click or tap here for a photo by Rob Tilley from May 2005.

Image © Paul Rands

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Intersection Directional Sign:

Signage on the junction with the Castlereagh & Oxley Highways at Gilgandra. April 2012. Click or tap here for a photo by Rob Tilley from May 2005.

Image © Paul Rands

Click or tap here for the continuation of the route as A55 in QLD
Click or tap here for the continuation of the route as State Route 86 in NSW
1 NSW Government, Roads and Traffic Authority, Schedule of Classified Roads and State & Regional Roads, 31 January 2011.
2 NSW Government, Department of Main Roads, Historical Roads of New South Wales brochure, Castlereagh Highway.
3 NSW Government, Department of Main Roads, The Roadmakers, A History of Main Roads in New South Wales, ISBN 0 7240 0439 4.