BREARLEY Avenue, from First Street to Dunreath Drive, has been permanently closed to make way for the new Belmont Station.
It closed overnight on January 16.
A modified layout has been put in place, with First Street now the primary road.
Traffic on Brearley Avenue will be required to give way at the T-junction.
Motorists will no longer be able to access Perth Airport’s T3 and T4 via Brearley Avenue.
At Dunreath Drive, traffic exiting the terminals will have the option of turning left to Tonkin Highway or right to Fauntleroy Avenue.
Traffic on Tonkin Highway and Great Eastern Highway eastbound will be directed to the terminals via the recently constructed Dunreath Drive interchange.
Westbound traffic on Great Eastern Highway will be directed to T3 and T4 via the upgraded intersection at Fauntleroy Avenue.