In the US, petrol prices have reached $4 per gallon, the highest since the start of the Iran war, according to the AAA motoring organisation. In the UK, petrol has hit 152.8p a litre, its highest in two years and around 20p more than the start-of the war. However, RAC's head of policy Simon Williams believes that the price of petrol could stabilise if the cost of oil doesn't increase further, although diesel prices are expected to rise.