The eastbound lanes of Parkes Way through Acton Tunnel are now open to traffic with a 40 kilometre per hour speed limit in place in the tunnel. Motorists are urged to drive with extra care in the area.
Parkes Way between Clunies Ross Street and Edinburgh Avenue remains closed westbound leaving the city, until further notice.
Westbound road users are encouraged to take an alternative route and plan their journey home. If possible, leave before or after the peak period.
Westbound traffic leaving the city will be diverted right onto Coranderrk Street, left onto Cooyong Street, straight onto Barry Drive, left onto Clunies Ross Street, Lady Denman Drive and onto the Tuggeranong Parkway.
Traffic travelling westbound from Commonwealth Avenue, onto Parkes Way, will be directed straight through to London Circuit and Northbourne Avenue, left onto Barry Drive, left onto Clunies Ross Street, Lady Denman Drive and onto the Tuggeranong Parkway.
Electronic message signs have been erected to alert people to the diversions in place.
ACT Fire & Rescue has handed over the scene to ACT Policing.