PARIS: Self-driving taxis, already booming in the United States and China, are emerging in Europe, with major companies launching trials this year in several capitals and the European Union set to step on the accelerator Monday. In China and the United States, private fleets of "robotaxis" – driverless cars loaded with sensors – more than doubled in 2025 to reach 8,000 vehicles across more than two dozen major cities, according to a May report by the International Energy Agency (IEA).