What is considered the most dangerous speed on the interstate?

The consideration of 0 mph as the most dangerous speed on the interstate stems from the principle that being completely stationary can create significant hazards, especially in a high-speed environment like an interstate. If a vehicle is stopped on the roadway, it poses a serious risk to both its occupants and other drivers who may be traveling at high speeds. In essence, a vehicle that is not moving can lead to collisions due to other drivers not expecting an obstacle in the travel lanes.

In contrast, as vehicles travel at higher speeds like 55 mph or 70 mph, while they do present risks such as reduced reaction time and increased severity of potential accidents, movement itself is a normal aspect of highway driving. A speed of 30 mph, while lower than the typical interstate speed limits, is not inherently dangerous when it aligns with the flow of traffic; however, driving significantly slower than surrounding traffic can increase the risk of accidents due to vehicles having to maneuver around the slower-moving vehicle.

Thus, the danger associated with 0 mph is largely due to its unpredictability in the flow of fast-moving traffic and the potential for severe accidents, making it the most dangerous speed in this context.