The reason why it is generally considered illegal to exceed the speed limit, even by a small margin such as 1 mph, is to establish a standard and enforceable rule that promotes safety on the roads. Here are a few reasons why:
Safety concerns: Speed limits are determined based on various factors, including road conditions, traffic density, and the design of the roadway. These limits aim to provide a safe and manageable speed for drivers to navigate the road network. Going even slightly above the speed limit can reduce the driver's ability to react to unexpected situations, increase the stopping distance required, and decrease overall control of the vehicle. By adhering to the posted speed limits, drivers are more likely to maintain a safe environment for themselves and other road users.
Consistency and predictability: Enforcing strict adherence to speed limits helps create a consistent and predictable traffic flow. When drivers travel at similar speeds, it reduces the risk of sudden speed differentials, which can lead to accidents and traffic congestion. It also allows for better traffic management and improves overall road capacity.
Law enforcement and deterrence: By establishing a clear rule that exceeding the speed limit is illegal, law enforcement agencies can effectively enforce traffic regulations and hold drivers accountable for their actions. This serves as a deterrent to discourage reckless driving behavior and maintain order on the roads.
Regarding the challenge of staying at the exact same speed all the time, it is indeed difficult to maintain a constant speed without any fluctuations. However, it is expected that drivers make reasonable efforts to stay within the posted speed limits and drive at a safe and controlled speed for the given conditions. Modern vehicles are equipped with speedometers that provide accurate readings, and drivers can use cruise control systems to help maintain a constant speed on highways where conditions allow for its use.
It's important to remember that traffic laws and regulations are in place to ensure the safety and well-being of all road users. Adhering to speed limits and driving responsibly are essential practices to minimize accidents and maintain a safer driving environment.