An oil spill on Lonsdale Street, Braddon, has closed one lane of the the road.
The ACT Emergency Services Agency said ACT Fire & Rescue were at the scene about 3.20pm.
"Teams from Transport Canberra and City Services will also be on scene," it said in a statement.
"Lonsdale Street, city-bound is closed whilst crews ensure the area is safe. The community is asked to avoid the area."