Lights and Audible Signals in Vehicles: DGT Regulations in Spain

🚨 1. Light signals on priority vehicles

Priority vehicles (🚑, 🚓, 🚒) use rotating blue or amber lights to warn of their presence. They must be on urgent service and may also use audible signals (sirens).

🔵 Blue: for police.
🟡 Amber: for firefighters, ambulances, civil protection.
  • Minimum visibility of 50 metres in all directions.
  • Motorcycles: light mounted at the rear with a telescopic mast.
  • Use without sound if there is no danger to other road users.

🚧 2. Light signals on roadworks and special-service vehicles

Vehicles such as tow trucks 🛻, sweepers, or special convoys 🚜 must use a amber rotating light (V-2) visible from 100 metres. They must also drive with dipped-beam headlights on.

Vehicle type Use of the light Conditions
Tow trucks When they obstruct traffic 360° visible, 100 m
Roadworks or services When they pose a hazard Throughout the job
Special vehicles From the moment they enter a motorway/expressway Until reaching the work site

🚖 3. “Free” indicator light on taxis

Taxis must carry a non-dazzling green light on the front-right exterior, visible from all angles. It indicates that the taxi is available for hire.

💡 4. Taximeter lighting

The taximeter must be illuminated when a trip begins (flag drop) so the user can see the fare at all times.

🔺 5. Advance danger-warning device

All motor vehicles except motorcycles must carry two reflective triangles approved by the DGT.

  • Placement: one in front and one behind the vehicle (except on one-way roads).
  • Distance: at least 50 m from the vehicle, visible from 100 m.

🔊 6. Audible signals

All motor vehicles must have a horn that emits a continuous, non-harsh sound. 🚲 Bicycles must have a bell (no other type of audible signal is permitted).

🚫 Prohibited: sirens or musical sounds on non-priority vehicles.
Permitted: intermittent horn use in imminent danger or on roads with sharp bends.

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