Drivers are spending more on road tolls annually than any other car-related stamp duty, according to Australia’s leading road toll operator.

Transurban revealed almost $2.7 billion is spent across 16 toll roads in Sydney, Melbourne and Brisbane.

Marion Terrill, transport director at the Grattan Institute said money spent on toll roads are doing little to address congestion, as a majority of drivers still avoid tolls by taking a slightly longer trip.

Experts have suggested all drivers should be charged different rates at different times to ease congestion.