Europe's congestion is costing fleets millions in wasted fuel, new Geotab data reveals London ranks near bottom for efficiency as stop-start traffic pushes vehicle fuel consumption to the highest level in Geotab study LONDON, July 17, 2026 - Geotab, a global leader in connected vehicle and asset management solutions, today revealed that more than 1.58 million litres of fuel were burned while Geotab-connected vehicles sat stationary in traffic across Europe's major capitals during 2025. Across the vehicles analysed, idle fuel waste reached an estimated €2.6 million over twelve months. The findings form part of Geotab's European Urban Freight Efficiency Index, which analysed a full year of connected vehicle data across seven major capitals: London, Berlin, Amsterdam, Dublin, Rome, Paris and Madrid. The €2.6 million figure reflects 2025's average European fuel prices. European diesel has risen above €2 per litre in the first half of 2026, a 30% increase triggered by geopolitical instability in the Middle East. These fuel prices would bring the cost of the same volume of idle waste to approximately €3.6 million. Across the seven cities in the study, the relationship between congestion and fuel efficiency diverges sharply depending on how traffic moves, not just how much of it there is. The most congested city is not necessarily the one costing fleets the most in fuel. London represents one of the most challenging operating environments for fuel efficiency among the seven cities. Ranked sixth (out of seven) in the Index, its stop-start traffic patterns prevent engines from reaching operating temperature, while its unpredictability compounds the problem. London recorded the highest passenger vehicle fuel consumption of any city analysed, at 15.60 litres per 100 kilometres, almost two-and-a-half times higher than Paris. Of every litre of fuel burned in London by passenger vehicles, 13.6% is consumed while stationary. Commercial trucks