When Jack Kerouac went On the Road he chose a gas-guzzling 5-litre Hudson. Hunter S Thompson’s ‘Red Shark’ Chevrolet in ‘Fear and Loathing in Las Vegas’ sported a thirsty 6-litre V8, just like Thelma and Louise’s emission-belching Ford Thunderbird.
Today however, the great American road trip needn’t be that way. For while transatlantic air travel inevitably makes a dent in the atmosphere, it’s perfectly possible to tread more lightly than ever on arrival.