The Alliance of British Drivers is calling for the tolls at the Dartford crossing to be scrapped completely.
The Government plans to remove the existing barriers by autumn next year but motorists will still have to pay to use the crossing by phone, text or online.
The Alliance says the free-flow charging will cause inconvenience for drivers having to remember to pay and that they risk getting fined if they forget, plus the hassle of running such a system.
More top news
Tuesday night's weather for the west of the region
Tuesday night's weather for the east of the region
Most of the region's MPs will support the Government's motion calling for air strikes in Syria, writes Political Correspondent Phil Hornby.