The traffic jam that occurred on Christmas Day on Mount Parnassus, specifically on the road from Livadi to Arachova, highlighted the challenges faced by electric vehicles in extreme conditions.

According to the Greek Police (EL.AS.), many of the cars that became immobilized due to the low temperatures were electric, a factor that contributed to the gridlock, which lasted until 9 p.m.

What Happened

The return of holidaymakers from the Parnassus ski resort turned into an ordeal for drivers, as the freezing temperatures in the area affected the operation of electric vehicles. According to reports, many electric cars experienced battery issues, leading them to stall in the middle of the road. The situation worsened as drivers tried to manage charging their vehicles, with no charging stations available in the area.

Blizzard in Arachova

As reported by newsauto.gr, extreme weather conditions, such as a drop in temperature—or even excessive heat—can impact an electric car to the point of immobilization. This is primarily due to issues related to battery performance and the increased energy demands of the vehicles.

It is clear, therefore, that the owners of the vehicles that caused the massive Christmas traffic jam did not have sufficient charge in their batteries—not out of negligence, but because destinations like Arachova lack high-voltage charging stations. By contrast, similar weather conditions are a daily reality for drivers in Northern Europe, where electric vehicles make up 50% of new car sales. However, those countries have an extensive network of high-voltage chargers.

Possible Causes of Immobilization in Freezing Temperatures

1. Complete Battery Depletion
   In extremely low temperatures, battery range drops significantly. If there is insufficient charging or if the journey exceeds the adjusted range, the vehicle can stall before reaching its destination. Note that the need to heat the cabin and the batteries increases energy consumption, reducing range by up to 40%.
2. Inability to Activate the Battery
   Lithium-ion batteries perform best within a specific temperature range. If temperatures drop too low, they may fail to deliver the voltage required to power the vehicle.
3. “Freezing” of the Energy Management System
   The Battery Management System (BMS), which protects the battery from damage, may limit or block energy delivery to the vehicle under extreme cold conditions to prevent battery wear, leaving the car immobilized.

In conclusion, the main reason that three electric cars (according to reports) stalled on the Arachova–Livadi route was a miscalculation of their battery range due to the freezing temperatures.

Detailed Statement from the Greek Police (EL.AS.) Regarding the Incident

Regarding online media reports about vehicle immobilizations and traffic disruptions due to adverse weather near the Arachova settlement in Boeotia, as well as related traffic control issues, the Headquarters of the Hellenic Police announced the following:

In the Arachova settlement, continuous traffic checks are being conducted by police officers to ensure vehicles are equipped with snow chains and that traffic is carried out using them when deemed necessary. Due to the low temperatures prevailing in the area, many electric vehicles experienced technical issues, leading to their immobilization during the return from the ski resort.

The public is reminded of the announcement issued on December 24, 2024, by the Central Greece General Police Directorate regarding the condition of the road network in the area. Drivers of all vehicles are required to carry snow chains or similar anti-slip equipment if their vehicles are not equipped with special tires. They are also obliged to use this equipment according to the instructions of the police authorities to ensure the smooth flow of traffic.

See related photos from Star Central Greece