Most people travel to work by car, showing how hard household budgets have been hit by rising fuel costs, according to a new report.
A study by the GMB union showed that two thirds of workers in England and Wales travelled by car, as a driver or passenger, almost 20% by public transport and one in 10 walked.
Separate figures for Northern Ireland showed that over four out of five people used a motor vehicle to get to work.
The GMB report, published ahead of the union's annual conference in Plymouth, noted that the price of unleaded petrol and diesel had almost doubled over the past decade.
General secretary Paul Kenny said: "These figures demonstrate why the massive hike in the price of fuel and of public transport has hit workers very hard. It is no wonder household budgets have taken a hammering."