$86 millionTotal budget
Under ConstructionProject phase
Main Roads WALead agency
Late 2019Start date
Early 2021End date
Construction of an interchange at the Roe Highway and Kalamunda Road intersection is underway and includes the installation of a new bridge, two roundabouts and on and off ramps.
Currently the intersection suffers from heavy congestion and has a higher than average number of crashes. This upgrade will assist in improving road safety for residents in Kalamunda and the foothills of Perth.
The project will also remove one of the last signalised intersections on Roe Highway.
No right turn into Kalamunda Road from Roe Highway
Starting early-September, vehicles will no longer be able to turn right into Kalamunda Road from Roe Highway heading north. Traffic will be detoured via Maida Vale and Priory Roads.
Main Roads WA has worked closely with the City of Kalamunda to coordinate the timing of this change with the City’s proposed works on Maida Vale Road, to ensure that both sets of works are scheduled to minimise impacts on road users and local residents. This arrangement will be in place for 12 weeks.
New Kalamunda Road alignment to open
In early September traffic will move onto the new temporary Kalamunda Road alignment between Midland Road and Roe Highway, marking a significant milestone for the Roe Highway Kalamunda Road Interchange project.
Following intensive work on the road surface, the first vehicles are expected to be able to use the new alignment early in the morning on Saturday 5 September.
Work will then start on excavation of the redundant section of Kalamunda Road, allowing the new section of Roe Highway to be connected underneath.
As soon as the new Kalamunda Road alignment is open, traffic will no longer be able to turn right from Roe Highway northbound into Kalamunda Road eastbound.
This closure of right turn access will be in place for approximately 12 weeks, with traffic detoured via Maida Vale and Hawtin Roads, back on to Kalamunda Rd.
Extensive signage will be displayed in advance, and after the change.
The turning movement from Kalamunda Road westbound to Roe Highway southbound, which has been closed since June, will be reinstated via the newly constructed southbound on-ramp via a roundabout.
There will be a temporary entrance to the Hillview Public Golf Course on Kalamunda Rd directly off the new roundabout on the eastern side of Roe Highway.
Out of hours works
Road works to finalise the new alignment will be done at night, in the week leading up to switching traffic onto the new surface. These night works will be done between 7pm and 7am.
Temporary closure of right turn access from Kalamunda Road westbound to Roe Highway northbound
The closure of right turn access at the intersection will will occur from 6 January to early April 2021 and allow construction of the new northbound carriageway, and the western roundabout of the interchange.
• Light vehicles will be detoured west along Kalamunda Road to the roundabout at Newburn Road, where they can U-turn back towards the intersection and access Roe Highway via the northbound on-ramp.
• Heavy vehicles will be encouraged to detour via Stirling Crescent and Great Eastern Highway bypass to Roe Highway northbound.
Extensive signage will be in place to alert drivers to this change.
The removal of traffic signals at the intersection will occur at the same time as the opening of the new Roe Highway temporary alignment. This will result in a significant reduction in congestion.
As per the current arrangement, vehicles heading north on Roe Highway will not be able to turn right at Kalamunda Road. The Maida Vale Road detour will remain in place.
Temporary closure of Roe Highway northbound on-ramp to Kalamunda Road
The Roe Highway northbound on-ramp to Kalamunda Road will be closed from 8pm Wednesday 13 January until the end of March 2021.
The ramp closure will allow construction of the new Roe Highway northbound carriageway, and the western roundabout of the interchange.
Signage will be in place to alert drivers. Please see map for detour information.