Perth Traffic Update: Cedric Street Lane Shifts and CBD Transit Disruptions Today

Commuter Overview for Wednesday, 4 March 2026

Perth commuters should prepare for a mix of infrastructure-related lane shifts and specific public transport disruptions this morning. While the metropolitan freeway network is largely flowing at peak capacity, major ongoing projects in the northern corridor and a specific service alert in the CBD will require extra travel time for those traversing the Stirling and city precincts.

Major Roadworks: Stirling and Mitchell Freeway

The most significant change for motorists today involves the Cedric Street interchange. Following the recent progress on the Stephenson Avenue Extension, traffic on Cedric Street eastbound has been shifted to a temporary alignment between Ellen Stirling Boulevard and the Mitchell Freeway northbound on-ramp. This configuration is expected to remain in place through mid-March 2026. Motorists intending to access the Mitchell Freeway northbound should position themselves in the left lane earlier than usual to avoid late merging. Pedestrians should also note that the northern footpath on Cedric Street remains closed, with detours in place on the southern side.

On the Mitchell Freeway, while the smart freeway technology is fully operational southbound from Hester Avenue, localized tie-in works continue near the new Stephenson Avenue bridge. Drivers may notice workers on the verge and occasional off-peak lane restrictions as finishing works progress toward the full interchange opening scheduled for April.

Public Transport and Transperth Alerts

Public transport users in the Perth CBD should be aware of a specific service disruption affecting the Red CAT bus route today, Wednesday, 4 March. Commuters who rely on this service for cross-city travel should check the live Transperth app for stop-specific closures or timing adjustments. Furthermore, several bus routes—including the 281, 350, 568, 597, and 915—have newly implemented service changes and additional frequency that went into effect earlier this week, offering better connectivity for northern and southern suburbs.

For those in the south-eastern corridor, the Armadale Line remains fully operational following its extensive multi-year upgrade. The new Byford Station and elevated rail sections are now handling standard peak loads, though minor nightly maintenance closures are scheduled later this month.

Regional Warning: Great Northern Highway

Following a bushfire emergency warning issued yesterday for the Bullsbrook and Muchea areas, motorists heading north on the Great Northern Highway should exercise extreme caution. While the road is currently open, there may be reduced visibility due to lingering smoke or utility crews working near the road reserve. Drivers are advised to reduce speed and follow any directions from emergency services in the Shire of Chittering and City of Swan.