Why is it unsafe to overtake if there is oncoming traffic?

Overtaking when there is oncoming traffic is particularly dangerous because it significantly increases the risk of a collision. During an overtaking maneuver, the driver moves into the opposing lane, where oncoming vehicles are traveling in the opposite direction. If the driver misjudges the speed or distance of oncoming traffic, this can result in a head-on collision, which is often severe due to the high speeds involved.

Additionally, visibility can be compromised if there are obstacles like curves, hills, or other vehicles, making it more difficult to assess the safety of the maneuver. The fundamental principle in road safety is to avoid actions that can lead to dangerous situations, and overtaking in the presence of oncoming traffic exemplifies a situation where the possibility of a serious accident is greatly heightened.