Signs displaying a photograph of a semi-submerged car are being put on a tidal causeway in Northumberland.
It is hoped that the picture will have more impact than text
The move comes after seven rescue call-outs to stricken motorists at Holy Island causeway this year.
Northumberland County Council hopes the new signs will stop drivers becoming trapped at high tide by encouraging them to check tide timetables.
They are being installed at the causeway entrance and in the Lindisfarne car parks.
Dick Fraser, head of highways policy for Northumberland County Council, said it was hoped the picture of the causeway - digitally altered to show the apparently-submerged car - would have more impact than existing text signs.
He said: "Despite warnings and signs, drivers do keep getting caught out.
"This is a graphic photo which highlights the dangers to drivers in a way that words cannot.
"Many of those who find themselves cut off by the tide are from outside the area and don't realise how quickly it can come in."
The county council has worked on the project with Holy Island Parish Council.