It seems the Commonwealth Bridge on Parkes Way is becoming a magnet for stuck trucks.
In October last year a truck hauling an excavator blocked the Parkes Way tunnel for two days, leading to a $1.2 million insurance bill.
On Thursday another one carrying a large prefabricated concrete wall slab became wedged under the bridge.
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The truck shut down one westbound lane, police said. Debris was scattered over the road after the vehicle hit the underside of the bridge at about 2.30pm.
However, the scene was quickly recovered and by 3pm the truck had been extracted from the bridge and was off the road.
WorkSafe ACT spokesman said inspectors had been called to the site but had determined that the matter needed no further investigation.