Why do many head-on collisions occur when passing on two-lane roads?

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Many head-on collisions occur when passing on two-lane roads primarily because drivers misjudge the closure rate of oncoming traffic. This happens when a driver attempting to overtake another vehicle overlooks how quickly an oncoming car is approaching. A driver may not accurately assess the distance or the speed of the oncoming vehicle, leading to critical timing errors when deciding to pass.

In a scenario where traffic is moving fast, it can be easy to miscalculate the time it takes to safely complete a pass. Since the conditions on two-lane roads often involve higher risks—due to limited visibility and varying speed limits—this misjudgment can result in dangerous situations, such as head-on collisions. This highlights how critical situational awareness and proper judgment of speed and distance are when maneuvering on roads where opposing traffic is present.