London is the third most expensive city in the world to drive in both a petrol and a diesel car, new data published today (Wednesday, January 10) suggests.

Furthermore, eight other UK cities appeared in the ‘top 50’ list of the most expensive cities in the world for diesel cars in 2023, up from five the previous year.

The data, which shows the impact of congestion on the cost of driving, has been published as part of TomTom’s annual TomTom Traffic Index, a report detailing traffic trends seen in 387 cities across 55 countries throughout 2023.

This year, TomTom has again assessed the cost of driving in terms of time, money and environmental impact for every mile driven.

Data relating to average travel times, detailing the country’s most congested cities, shows London remained the slowest city in the world to drive through, and the third most expensive.

Stephanie Leonard, head of government and regulatory affairs at TomTom, said: “Despite petrol prices falling, our analysis of the economic impact of congestion showed that London’s slow-moving traffic and higher fuel consumption made it one of the most expensive cities in the world for driving.”

TomTom estimates that avoiding peak hours could save drivers up to £187 per year on fuel costs.

Ranking: UK cities with highest cost of driving at rush hours

City

Petrol car

Diesel car

 

Yearly fuel cost

Due to congestion

Yearly fuel cost

Due to congestion

London

£734

£187

£649

£158

Swansea

£525

£116

£549

£117

Brighton and Hove

£566

£102

£549

£82

Sheffield

£524

£102

£541

£87

Edinburgh

£533

£90

£518

£74

Bristol

£536

£115

£530

£100

Glasgow

£505

£91

£504

£77

Manchester

£545

£122

£520

£106

Birmingham

£517

£109

£513

£92

Leicester

£576

£109

£509

£86

Average annual fuel cost spent for a home-to-work distance of six miles driven at morning and evening peak hours (total 12 miles/day), in minutes/seconds. Source: TomTom.

Impact of congestion on CO2 emissions

Queuing traffic on road

Leonard explains that low emission zones (LEZs) across Europe have proven to make a long-term difference to the levels of pollutants and greenhouse gases in urban environments.

“Above all, they ensure that drivers of polluting vehicles are disincentivised from driving into city centres by levying heavy charges,” she said.

“However, the best thing to hope for is the UK’s LEZs become irrelevant as the volume of electric vehicles (EVs) increases in line with other regulations that ban the sale of combustion engine vehicles.”

When EVs do become the norm, better traffic management will be needed to ensure viable traffic flows and the efficient use of city infrastructure, particularly in cities with antiquated road networks like London, argues Leonard.

“Real-time data intelligence will play a significant role here in transforming how people move around UK cities, supporting our transition to less diesel and petrol consumption and more sustainable transportation,” she added.

Ranking: Cities with the highest CO2 emissions per car at rush hour

City centre (3-mi radius)

Petrol car

Diesel car

 

Yearly fuel cost

Due to congestion

Yearly fuel cost

Due to congestion

London

1116 kg

285 kg

1048 kg

255 kg

Manchester

890 kg

199 kg

851 kg

173 kg

Bristol

886 kg

189 kg

873 kg

165 kg

Brighton-and-hove

880 kg

159 kg

878 kg

131 kg

Sheffield

874 kg

171 kg

878 kg

141 kg

Swansea

874 kg

193 kg

910 kg

194 kg

Edinburgh

863 kg

146 kg

845 kg

120 kg

Birmingham

847 kg

179 kg

835 kg

150 kg

Liverpool

841 kg

138 kg

815 kg

112 kg

Leicester

839 kg

159 kg

823 kg

140 kg

Average annual CO2 emissions based on a home-to-work distance of six miles driven at morning and evening peak hours (total 20 km/day), in kg of CO2. Source: TomTom.

For more findings from the annual TomTom Traffic Index, including average travel times in the country’s most congested cities, click here.