Driving 1 km (or 0.62 miles) over the speed limit can still be considered illegal in many jurisdictions. The specific laws and regulations regarding speeding vary from country to country and even within different regions or states. It's important to familiarize yourself with the speed limits and traffic laws applicable to your location.
While the tolerance for exceeding the speed limit without penalties can also vary, exceeding the speed limit by any amount can technically be a violation of the law. However, law enforcement officers generally exercise some discretion when it comes to minor speed infractions. They may choose not to pull you over for driving slightly above the speed limit, particularly if you are within a reasonable margin. What is considered a reasonable margin can depend on various factors such as road conditions, traffic flow, and the specific circumstances of the situation.
That being said, if you consistently exceed the speed limit, even by a small amount, you increase the likelihood of being pulled over and receiving a ticket or facing other penalties. It's always best to adhere to the posted speed limits and prioritize safe driving practices. Remember, the primary purpose of speed limits is to ensure road safety and reduce the risk of accidents.