Maribyrnong Truck Action Group says night-time truck traffic has increased on Buckley and Moore streets, which don't have a curfew limiting night movement.

Mr Finegan said in a written response to The Mail's questions that the increase in truck numbers on Buckley and Moore streets was "to be expected as these streets are the last remaining arterial roads in the Yarraville-Footscray area without a curfew".

Existing curfews, introduced in 2002, had led to a decrease in truck traffic along Francis and Hyde streets in curfew hours, Mr Finegan said.

Trucks are not allowed on Francis Street between 8pm and 6am, Monday to Saturday, and 1pm to 6am, Saturday to Monday.

"Daily traffic volumes have remained steady or risen in line with traffic increases recorded in the Melbourne metropolitan area," Mr Finegan said. "The counts on Francis Street indicate a slight increase in the number of all vehicles, but truck volumes have decreased. In curfew hours, the volumes east of Williamstown Road have decreased by 48per cent compared to 2002 and by 79per cent west of Williamstown Road. Curfew truck numbers at other locations being monitored, including Somerville Road, show fluctuations from year to year."

Mr Finegan said a road tunnel under Footscray and truck connection to the West Gate Freeway would reduce trucks on residential streets in the western suburbs. He said VicRoads officers spent an average of 500 hours a month enforcing curfews across the western suburbs.