Boom gates are down at a busy rail crossing in Bassendean, with motorists urged to seek an alternate route as traffic builds in the area.
Transit police are on site at the Guilford Road and Collier Road rail crossing, with traffic slow around the intersection.
The disruption is one of several traffic headaches that has disrupted Perth roads on Tuesday morning.
Traffic is extremely slow on approach on Kwinana Freeway northbound before Roe Highway in Bibra Lake after a crash.
The crash caused the left emergency lane to be blocked, with towing crews called to the scene.
Main Roads WA initially warned traffic was heavy on approach and urged motorists to drive with care.
The crash has since been cleared but traffic remains slow in the area.
A breakdown on Graham Farmer Freeway westbound after Victoria Park Drive in East Perth has resulted in the left lane being closed by incident response officers.
Traffic is slow on approach, with motorists urged to allow for a safe merge.
A truck breakdown further south on the Kwinana Freeway northbound after Berrigan Drive in South Lake has been cleared.
Likewise, an earlier crash on the Kwinana Freeway northbound at Mortimer Road in Wellard has been cleared after debris sprayed across the lanes.
A crash on the Tonkin Highway southbound exit to Roe Highway in Kewdale has also been cleared after traffic was reduced to a single lane.
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