When are overtaking and passing to the right not permitted?

Overtaking and passing to the right are not permitted when within 100 feet of an intersection or railroad crossing because this rule is designed to ensure safety in areas where unexpected stops or turns may occur. Approaching intersections and railroad crossings poses a higher risk due to the potential for vehicles to change lanes or stop suddenly. By prohibiting passing in these zones, it helps prevent accidents that could result from a lack of visibility or other drivers unexpectedly altering their course.

In contrast, passing on a one-way street, during heavy traffic, or on roads marked for passing are situations where overtaking and passing could be allowed under certain conditions. These scenarios generally provide more predictable driving behavior and reduced risk of sudden movements from other vehicles.