Traffic congestion is costing the economy more than £4.3 billion a year, according to a survey.
The cost of the jams is equivalent to £491 per car-commuting household, the survey showed.
More than £426 million is wasted on fuel alone a year, the survey by the Centre for Economics and Business Research and traffic information company Inrix said.
The cost in terms of lost time is £331 per commuter a year, or £2.7 billion, while hold-ups to business or freight vehicles amounts to £1.1 billion annually being added to household costs.
Inrix chief executive Bryan Mistele said: “Traffic congestion impacts everything from how long it takes us to get to work and the amount of fuel we consume in our vehicles to the costs of food at the grocery store.”