Tonkin Extension Alliance

The extension of Tonkin Highway will reduce traffic pressure and travel time for private and freight traffic, improve road connectivity between current and future residential, business and employment precincts, and improve safety.

The Tonkin Highway Extension project comprises of:

A 14km extension of Tonkin Highway from Thomas Road to South Western Highway as a four-lane dual carriageway.
Principal Shared Path (PSP) on the eastern side of the Tonkin Highway extension for the full 14km length, including:
Connections to Thomas Road, Orton Road, Bishop Road, Mundijong Road and South Western Highway
Five underpasses at two grade separation locations (Thomas Road and Bishop Road)
Footbridge overpass at Orton Road (east of the highway alignment)
Local road connections (Copper Road and Adamson Street)
Grade separated interchange at Bishop Road
Roundabouts on Tonkin Highway at Orton Road, Mundijong Road and South Western Highway
Underpasses at Abernethy Road (road, pedestrian, cyclist and equine), Gossage Road (pedestrian, cyclist and equine) and Shanley Road (road, pedestrian, cyclist and equine)
Roundabouts at Hopkinson Road/Abernethy Road, and Shanley Road/Jarrahdale Road/South Western Highway
Bridges over rail at Bishop Road (as part of interchange over the freight rail) and Wright Road (over road and rail)
Noise and amenity (visual screening) walls
Lighting for the main roads and the PSP throughout project
Access and connectivity improvements to local roads including fire and emergency egress where required
Tonkin Highway will be a dual carriageway with two lanes in each direction, and a posted speed of 100km/h between intersections.
The Thomas Road Upgrade project will complement the Tonkin Highway Extension project, and comprises of:

Widen and duplicate 4.5km of Thomas Road between Kargotich Road and South Western Highway (the section from Thomas Road over Rail to South Western Highway has already been upgraded as part of the METRONET Project).
Construction of a new grade separated interchange at Thomas Road and Tonkin Highway. This will allow traffic to move freely on Tonkin Highway and provide improved capacity for Thomas Road traffic.
Construction of 4.5km of new shared path on the south side of Thomas Road.
Provision of a new signalised equine crossing to connect Byford and Darling Downs bridle paths.
Local intersection upgrades and changes including:
Ballak Place: Left in left out only. Improvement to include left turn deceleration lane
Hopkinson Road (north of Thomas Road): Cul de sac
Kardan Boulevard: new roundabout
Hopkinson Road (south of Thomas Road): Cul de sac
Masters Road / Malarkey Road: new roundabout
Briggs Road: Left in left out access only
Plaistowe Boulevard: New traffic signals to improve access for general traffic and buses
Wungong South Road: Reconstruct to an improved priority controlled intersection
Equine path network north of Thomas Road: realigned to maintain connectivity and accommodate road widening.
Amenity (visual screening) walls and noise barriers.
Lighting for the length of Thomas Road upgrades.
Thomas Road will be upgraded to a dual carriageway with two lanes in each direction, and a posted speed of 70km/h.

The Tonkin Highway Extension and Thomas Road Upgrade are being delivered together due to the timing of development and delivery, overlap of stakeholders and geographical location.