Athens: Traffic lights go out on main roads

A power voltage drop put traffic lights out of operation on central road axes of Athens in the afternoon of Wednesday, September 2, 2026, according to reports beginning to be published around 4:28 p.m. The Mesogion, Kifisias, Alexandras, Katechaki, and Vouliagmenis avenues found themselves without traffic signals, resulting in immediate disruption of traffic in one of the capital’s busiest areas. The problem was recorded almost simultaneously by six news outlets, NewsIt, CNN Greece, Eleftheros Typos, The Press Project, Vradini, and Newpost, a fact showing the extent of the signaling network failure in the city. Newpost specifically reported the Kifisias, Alexandras, and Mesogion axes, while in publications the phenomenon was described sometimes as a “voltage drop” and sometimes as a “voltage sag.”

According to The Press Project, a possible cause of the voltage drop is connected to fires that broke out near photovoltaic parks in the areas of Thebes and Paiania. The publication presents this possibility as likely and not confirmed, as there was no official announcement from a competent body about the exact cause of the network failure. This connection becomes particularly interesting as on the same day a fire in Paiania was ongoing near the Attica Road, in an area where, according to the report, photovoltaic installations are located.

In practice, loss of signaling on axes like Kifisias and Mesogion, among the most loaded in Attica, turned into major traffic jams and chaos, as several news outlets described. Drivers had to cross critical junctions without traffic light guidance during peak hours, with delays extending to adjacent streets. The episode highlights the sensitivity of Athens’s traffic signal network to voltage fluctuations, an issue connected to discussion of modernizing traffic management in the area, as well as the new traffic management system with cameras and drones that has been presented for Attica.

By Wednesday afternoon, September 2, 2026, no official confirmation had been given for the exact cause of the voltage drop, while the possible connection to fires near photovoltaic parks in Thebes and Paiania remained at the level of a likely scenario, according to The Press Project. There was also no announcement regarding the restoration time of traffic lights on the five affected axes. The absence of official confirmation, despite six separate publications recording the event, leaves open whether it was an isolated failure or a broader problem with the power distribution network in the area. The issue is expected to occupy competent services, as similar episodes raise again the question of the resilience of the capital’s traffic signal network to emergency conditions.