What should you do if the common speed on the expressway is above the posted speed limit?

Driving at the posted speed limit is the correct choice when the common speed on the expressway is above that limit. This ensures compliance with traffic laws, which are designed to promote safety for all road users. Even if other drivers are traveling faster, maintaining the speed limit helps prevent accidents that might occur due to significant speed differences between vehicles. It is essential to prioritize safety and adhere to the law, which mandates the maximum allowable speed for that section of the road.

Further context indicates that while it may seem logical to match the flow of traffic by driving faster, doing so could lead to engaging in unsafe behaviors or even legal repercussions. Reducing speed significantly can create additional hazards if other drivers are not expecting a sudden slowdown. Similarly, the suggestion to only increase speed in heavy traffic could lead to misjudgments about safe speeds, as it may not take into account individual circumstances. Therefore, adhering to the posted speed limit is the safest and most responsible choice.