The families say they want to prevent more deaths

Hundreds turned up for the walk, part of a campaign for barriers following the deaths of Tom Broomhall and Julian Bowen on April 30, 2004.

The pair were found dead in their car at the bottom of cliffs below the Kew Stoke toll road near Weston-super-Mare.

Julian's sister Louise Bowen said: "We want clear answers from the council."

She said the families wanted to know from North Somerset Council whether it was technically possible to install barriers and if so why they had not been installed before.

Family 'devastated'

Ms Bowen said the turnout for the walk showed the strength of public opinion.

"This has absolutely devastated us as a family and we are not going to rest until something is done."

The campaigners walked along the toll road from the Kew Stoke end and laid flowers at the point where the car went off the cliffs.

There have been four other deaths in two similar accidents since 1975.

And local woman Ann Pearson, 49, survived when her sports car came off the winding road and tumbled on to rocks 50 feet below a year ago.

The council is awaiting reports on the latest accident including the results of a police investigation

At the time of the last crash, it issued a statement saying it had spent more than �50,000 recently on maintenance of the toll road.

"This has included road patching, pothole repairs, improved signage, speed restrictions, white lining, new drainage, weight restrictions and marker posts on the seaward side of the road."