The Spanish traffic authority in Spain (DGT) has started deploying new speed cameras units equipped with LiDAR laser technology capable of measuring speeds and detecting sudden braking from as far as 1,200 metres away. These cameras represent a significant advancement in traffic monitoring, enabling simultaneous surveillance across up to six lanes while remaining undetectable by conventional driver alert devices.
The DGT has allocated a budget of €1,020,000 for this modernisation, which includes installing 122 new speed cameras throughout this year and the next. This strategic investment aims to enhance road safety by addressing speeding and risky driving behaviours more effectively than traditional radar systems.
Unlike standard radars that measure speed at a single point, these new devices use laser pulses to continuously record vehicle behaviour over extensive stretches of road. This capacity prevents common evasive tactics like abrupt braking near known checkpoints, ensuring drivers cannot bypass sanctions through such manoeuvres.
Technical features and operational flexibility
The cameras weigh just over 1.5 kilograms, allowing them to be mounted on portable tripods or installed inside unmarked Guardia Civil vehicles. Their compact size and mobility enable strategic placement at varying locations, complicating drivers' attempts to predict where enforcement is active.
The LiDAR technology delivers high-quality imaging regardless of lighting conditions, whether at night or during periods of reduced visibility. By emitting laser pulses and measuring the reflected signals from vehicles, these sensors calculate distance, speed, and trajectory with millimetre accuracy in real time, which enhances overall detection reliability compared to previous speed cameras types.
Monitoring six lanes simultaneously makes these speed cameras especially effective on high-capacity highways and expressways, where traffic volume and diverse driving patterns demand sophisticated control systems. This multipoint coverage accurately identifies offenders in complex traffic scenarios, detecting violations across adjacent lanes moving at different speeds.
Strategic deployment and enforcement strategy
The funding and rollout of 122 roadside cameras align with a broader plan to boost road surveillance across Spain. Installation sites are prioritised based on accident rates and frequency of violations, focusing resources on stretches demonstrating higher risk from speeding or abrupt driving.
A key advantage of these speed cameras is their invisibility to standard radar detectors and jammers, which typically rely on radio wave signals. Since LiDAR operates on a different spectrum, current commercial devices cannot detect or interfere with the system. As DGT sources stated, "the impossibility of anticipating exact locations obliges drivers to maintain constant compliance with speed limits," thereby fostering safer driving habits.
Additional capabilities and impact on driving behaviour
Beyond speed and braking control, the continuous tracking offered by LiDAR technology enables potential detection of irregular lane changes, illegal overtaking, and inadequate safety distances. However, legal restrictions determine which infringements automated systems can sanction at present.
The data collected can also provide valuable evidence for investigations following accidents, supporting the clarification of responsibilities with precise behavioural records. For compliant drivers, these radars should not alter their usual experience, but habitual speed reducers near known controls will need to adapt. The unpredictability and extended detection range make such strategies ineffective.
Traffic authorities maintain that steady compliance and predictability in speed limits are crucial to reducing accident rates on Spanish roads. The deployment of these new LiDAR radars forms part of a wider effort to promote continuous adherence to traffic laws through advanced, less detectable technology.