A traffic light that is off or stuck on flashing orange does not present the same level of risk. The response differs depending on whether it is a localized malfunction at a secondary intersection or a widespread failure on a major traffic route. Knowing how to distinguish these situations determines the appropriate contact person and the speed of intervention.
Traffic light off or flashing orange: two distinct legal regimes
A completely off light and a flashing orange light do not fall under the same regulatory interpretation. The off light reverts the intersection to the status of a unmarked intersection: the priority to the right applies strictly, unless there is a supplementary sign (yield or stop) installed below the light.
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The flashing orange light allows crossing but requires increased caution and adherence to priority rules. We observe that confusion between these two cases generates the majority of collisions at malfunctioning intersections.
A traffic sign fixed below the right light changes the situation. If a stop or yield sign is present, it takes precedence over the malfunctioning light. In the absence of any supplementary sign, each driver must yield to vehicles coming from their right, regardless of the usual configuration of the intersection. Knowing what to do in case of a malfunctioning traffic light first requires checking these elements before proceeding.
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A third case exists: the light that erratically alternates between several colors or remains stuck on green in all directions. This situation, rarer, constitutes an immediate danger and justifies priority reporting to law enforcement.
Numbers to call based on the severity of the malfunction
Not all malfunctioning lights warrant the same reporting channel. We recommend reasoning by severity level to direct the call to the appropriate contact.
Malfunction without immediate danger
The light is off or flashing orange at a low-traffic intersection, visibility is adequate, and users adapt. The correct reflex is to contact the public works department of the relevant municipality or metropolitan area. Several local authorities have online forms dedicated to reporting traffic lights, with tracking numbers and possible exchanges with technical services.
- City hall or intermunicipal switchboard: the public works department or public space directly manages the maintenance of lights on municipal roads
- Online form from the local authority: some metropolitan areas allow geolocated reporting with a photo, which speeds up diagnosis by the field team
- Municipal police number: useful if the city hall switchboard is closed (evenings, weekends) and the situation requires temporary regulatory intervention
Malfunction creating a collision risk
The intersection is located on a busy route, the light is completely off without a supplementary sign, or the light displays inconsistent signals. In this case, the report should target the national police or gendarmerie (local police station or territorial brigade) to request the dispatch of a regulating officer on-site.
Calling 17 (police emergency) remains the appropriate number when the malfunction is already generating near-accident situations or significant traffic blockage. The operator assesses the urgency and decides on the response.
Ongoing accident related to the malfunction
If a bodily injury accident has occurred due to the malfunctioning light, 15 (SAMU) or 112 (European emergency number) takes over. 112 works even without the usual operator’s network and remains the reflex to prioritize in case of doubt about the competent service.
Field reporting: speeding up response by technical services
The speed of repair directly depends on the quality of the initial report. A vague call (“a light is not working somewhere in the city center”) delays intervention by several hours.
An effective report includes three pieces of information: the exact intersection (names of the two streets), the type of malfunction observed (off, permanent flashing orange, inconsistent sequence), and the presence or absence of a supplementary sign below the light. Mentioning the time of observation also helps technicians cross-reference with any potential power outages in the area.
Traffic lights are often managed by intersection regulators powered by the local electrical grid. A sector-wide power outage can affect several intersections simultaneously, and public works technicians are aware of this. However, an isolated malfunctioning light on a network that is otherwise functional points to a fault in the controller or wiring, which requires a specific intervention.
Driver’s responsibility in front of a malfunctioning traffic light
A non-functioning light does not suspend the driver’s obligations. Priority to the right becomes the default rule as soon as the light no longer provides exploitable indication. Crossing a malfunctioning intersection without slowing down exposes one to liability in case of an accident, even if the user believes they had “normally” the priority when the light is functioning.
In the presence of a police officer or municipal traffic officer at the intersection, their instructions take precedence over any signage, including a light that may have been restored in the meantime. This hierarchy of signals is one of the first concepts of the highway code, but it becomes particularly important in these situations of transition between automatic signaling and human regulation.
Drivers who notice a malfunction on a route they use daily should report the malfunction even if they assume others have already done so. Technical services confirm that multiple reports expedite the prioritization of interventions, especially on weekends when maintenance teams operate on call.
In the face of a malfunctioning traffic light, the most useful reflex remains to distinguish the real urgency from mere inconvenience, to adapt driving to an intersection that has become unregulated again, and to provide a precise report to the right contact person. A well-qualified call saves time for everyone, both drivers and technicians.