White diamond on blue background: New road sign appears on European highways

A new road sign featuring a white diamond on a blue background is appearing on European roads, used to mark lanes reserved for high-occupancy vehicles. HOV lanes aim to promote carpooling and relieve pressure on the most congested arteries in large urban areas. This solution originates from North America, where so-called diamond lanes have been used for years in the United States and Canada. In Europe, this symbol is gaining popularity as a tool to combat traffic jams and excessive emissions, becoming a standard in more EU member states. The concept of lanes for vehicles with multiple passengers originates from the transport systems of the USA and Canada, where a white diamond is the traditional symbol for priority lanes. In Europe, this solution began to be implemented more widely in recent years, with France and Spain among the leaders in adapting this system. The goal is to change transport habits by promoting carpooling instead of solo travel.

This signage is already actively used in France, Spain, and Germany, and according to the latest media reports from March 12, 2026, it may soon appear on roads in Italy as well. The sign often appears alongside additional markings, such as 2+ or 3+, which specify the minimum number of people in a vehicle required to use the dedicated lane. In addition to carpooling participants, these parts of the roadway can usually also be used by taxis and public transport buses. The introduction of these regulations is intended to encourage drivers to give up solo travel, which directly translates to fewer cars on the roads during peak hours. Fine amounts for unauthorized entry onto an HOV lane: France: no data → 135 euros; Spain: no data → 200 euros

Drivers who ignore the new rules and enter a lane marked with a white diamond without the required number of passengers must expect severe financial penalties. In France, the fine for such an offense is 135 euros, while in Spain the sanctions are even stricter and amount to 200 euros. Enforcement of the new rules is carried out not only through direct police patrols but increasingly through video monitoring systems. The main argument of proponents of this solution is improved traffic flow and a significant reduction in pollution generated by individual transport.