The introduction of new cashless payment technology at the Dartford River Crossing, one of the busiest in the UK has been delayed due to testing.
The Highways Agency had intended to scrap toll booths and introduce a free-flow traffic system at the crossing across the Thames east of London around mid-October.
However, according to the project leader Nigel Gray, the cashless technology will be rolled out in late November at the earliest as more testing is required.
The AA welcomed the decision saying that 85 per cent of its members were unaware that, under the new system, they will have to pay by phone, online or by other methods.
But the Freight Transport Association said the delay was disappointing "as it may present additional costs to industry".