Trucks using the M5 East and M8 in Sydney will pay less for tolls under a promise by Labor if it wins the March election.
Oversized vehicles like trucks and some utes currently pay three times as much as cars, which Labor will slash to two times, saving around $8 a trip.
The changes will be introduced alongside broader relief which caps weekly tolls at $60 for regular motorists.
Both measures will run for two years starting January 1, 2024 alongside a sweeping review of the toll network headed by former ACCC chairman, Professor Allan Fels.
For a truck driver doing two trips a day, five days a week, savings will reach $3800 a year.
The scheme is capped at 10 trips each week but the opposition say it will also incentivise trucks off local suburban roads.
Opposition leader Chris Minns said tolls hurt small businesses like tradies who need to move around Sydney for work.
"The government's decision to put a new toll on a 20-year-old road is forcing truck drivers to use local roads, causing traffic chaos and congestion and hurting businesses," he said.
"Labor's toll relief policy will deliver more toll relief for small businesses, get trucks off local roads and provides a fresh start for our state's toll network and the drivers who use them."
