TRAM diversions remain in place in Melbourne’s CBD after an oversized truck crashed into overhead wires early this morning.

Commuters were warned to expect major delays after parts of Flinders St and Queensbridge St were shut down.

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Yarra Trams said Route 58 services, disrupted earlier after the incident, had resumed on their normal route but some delays could occur as work continues.

“Yarra Trams response crews are working to restore services as quickly and safely as possible,” a spokesman said.

VicRoads said one lane of traffic remained closed in both directions at Power St and the Flinders St rail bridge.

The large truck brought down tram lines early this morning while driving down the busy street and became hooked on more of them as it attempted to perform a U-turn near Queen St.

media_camera The truck that clipped the powerlines came to a stop near Crown Casino. Picture: Nicole Garmston.

media_camera The truck was carrying an excavator. Picture: Nicole Garmston

media_camera Roads are expected to remain closed until lunchtime. Picture: Nicole Garmston

Its believed the truck, which was carrying an excavator, continued over the William St bridge before coming to a stop near Crown Casino.

Flinders St has now been reopened in both directions, while Queensbridge St also has one lane open in each direction.

Reminder - Service changes currently apply on the Route 58 due to emergency overhead wire & infrastructure repairs under the rail overpass at Flinders St and along Queensbridge St. More info: https://t.co/4o6NrUBV43 — Yarra Trams (@yarratrams) November 20, 2017

Delays are expected to continue as crews work at the scene.

Motorists have been advised to use King St or St Kilda Rd as alternative routes.

Route 58 trams in both directions are diverting via Elizabeth St, Victoria St & Flemington Rd along Route 59.

Shuttle trams are running between the Royal Children’s Hospital and City Rd via Kings Way.

media_camera Authorities work to fix powerlines that were hit by a truck. Picture: Nicole Garmston

media_camera It may take until midday to fix the powerlines. Picture: Nicole Garmston

No one was harmed.