Thursday, July 1, 1999 Published at 10:31 GMT 11:31 UK
Cable cars: Danger in the skies
The cable car at Mont Blanc in France: Treacherous terrain
The deaths of 21 people in a cable car accident in Saint-Etienne en Devoluy has highlighted the issue of safety in the perilous conditions in which the cars operate.
Cable cars are used safely around the world every day. But by their nature, being high off the ground and usually above dangerous terrain, the results of any accident can be particularly severe.
In March this year, a US marine pilot was acquitted of all charges relating to the deaths of 20 people when his jet sliced through cables in the Italian town of Cavalese. Rescuers in the ski resort found no survivors in the wreckage.
Relatives of those who died were outraged by the not guilty verdict on Marine Captain Richard Ashby by a US military jury on charges of involuntary manslaughter, destruction of property and dereliction of duty.
Earlier this week 40 tourists were rescued from a cable car in Norway, in which they had been stranded for almost eight hours.
An inquiry into why the cables seized up is underway, and is expected to focus on whether the summer heat had an effect.
An EU directive into the management and safety standards of cableways - a term which includes chairlifts and gondolas as well as cable cars - is in the pipeline.
In the UK there are no official regulations governing their safety.
Instead the burden rests on operators, who have a duty of care to ensure public safety, says Terry Williams, an inspector with the Health and Safety Executive.
It means having insurance, performing regular safety inspections, and checking the state of the wire rope which supports the cars.
The Nevis Range Development Company operates one of only three gondola, or enclosed chairlift, systems in the UK.
Spokeswoman Mariam Austin says the company has three full-time engineers who perform manufacturer-approved checks and log them daily.
Electronic sensors at both ends of the 2.5km gondola, which transports skiers 2,150 metres, check for changes in wind speed.
Because ropeways are highly exposed to the elements, strong gusts pose a major hazard.
"The winds in the outer area of the continent are much, much higher than on mainland Europe. Sometimes the Europeans just don't believe that we can get gusts topping 100mph," says Mr Williams.