Which of the following is not a valid reason to keep your speed down when driving beside parked vehicles?

Keeping your speed down when driving beside parked vehicles is crucial for several safety reasons. Among these, it is particularly important to be mindful of the potential hazards presented by parked vehicles. For instance, drivers' doors may open unexpectedly, especially if the driver did not check their mirrors or if their door is obstructed by another vehicle. By reducing your speed, you have more time to react to such situations.

Additionally, children may run out from between vehicles, which is a significant concern near parked cars. Playful children may not be visible until the last moment, so a slower speed increases your ability to stop rapidly if necessary.

Vehicles may also be pulling out, which can occur if parked cars are getting ready to merge back into traffic. When you drive at a lower speed, you can give these vehicles more time and space, ensuring safer driving conditions for both you and the vehicle exiting the space.

However, proximity to traffic lights does not necessitate a speed reduction specifically when near parked vehicles. Traffic lights are controlled signals that manage flow based on traffic conditions and do not directly relate to the potential hazards associated with parked vehicles. This is why it is not considered a valid reason to specifically keep your speed down in that context.