A Lane closure on one of Swansea's busiest roads has been branded dangerous by motorists who claim they have been forced to jump lanes without sufficient warning. Repair work being carried out by gas company Transco has caused the blocking off of a lane in Oystermouth Road near the Patti Pavilion.

But drivers heading towards the city centre on Tuesday morning say they were not given enough prior warning that their lane would end.

Some drivers said they had to brake suddenly before relying on considerate motorists in the neighbouring lane to let them out.

The work on the east-bound carriageway has also caused queues as motorists reach the bottleneck at busy periods.

Paula Thomas of Sketty said: "The signs do not give enough warning and before you realise you are frantically having to change lane.

Fortunately there was a lorry driver behind me yesterday morningwho had second guessed that I was not aware what was happening, and he let me in."

A spokesman for Transco said the work is essential because of a gas leak problem that was detected last month but has proved problematic to cure.

She said: "There is a lane blocked off as we are carrying out gas repair work.

"But we have checked the signage and as far as we are concerned, it is fine.

"We hope to have completed the work and to be off site by Friday."

Derek Evans, from the Swansea Bay branch of the Institute of Advanced Motorists, said the matter needs to be sorted out.

"It's a bit naughty if they've done this," said Mr Evans. "It should be clearly signboarded and they should have warning signs if they are expecting you to drive into a bottleneck."

As well as clearer signs, Mr Evans said the situation could be eased by drivers taking action themselves.

"Sometimes a little bit of courtesy stops traffic building up," he said. "It's a problem everywhere in Swansea at the moment. Everywhere you go in Swansea traffic seems to be on stop."

A Swansea Council spokeswoman said: "We have been to inspect the signage."