An electric scooter was spotted early Tuesday morning on the Metropolitan Expressway in Tokyo¡¯s Shibuya Ward, prompting highway officials to release video footage on social media to warn riders of the extreme danger.

The Metropolitan Expressway operator said the incident occurred at around 3 a.m. on the inbound lane of the Shibuya Route. Video the company released shows an individual unlawfully riding an electric scooter onto the highway for about 1 kilometer, sometimes veering from the shoulder into traffic lanes. Fortunately, drivers were able to spot the scooter in time and avoided a serious accident, the company said.

While electric scooters are permitted on regular roads, their use on expressways is strictly prohibited due to the heightened risk of fatal accidents.