Supermarket petrol prices may have fallen this week but drivers feel they are being ripped off by motorway services fuel tariffs, according to an RAC survey.

Research from the RAC showed that petrol and diesel prices at motorway service stations can be as much as 10p higher than those elsewhere.

Of 1,463 motorists polled, 74% reckoned motorway prices were "very expensive" with 26% refusing to buy fuel at motorway stops.

As many as 63% said prices should be capped so fuel was no more expensive on motorways than at non-motorway forecourts.

More than a quarter (27%) would be happy with fuel being capped at just a few pence over the non-motorway price, and only 10% believed nothing needed to be done.

Also, 44% said they only bought fuel at motorway services when they had no other choice.

Almost 20% admitted to putting in "just enough fuel to get by" at motorway services and finding a cheaper alternative later.

In addition, 76% said service stations should display the price of their fuel before drivers pulled off the motorway so they knew what they would have to fork out.

RAC fuel spokesman Simon Williams said: "It's no wonder that motorists feel held to ransom with prices on the motorways inflated to such an extent.

"We can see no reason why motorway fuel should be so much more expensive. In fact, arguably it is much easier from a delivery point of view than it is getting fuel to urban filling stations."