* Type of road: Highway driving will have a much higher average speed than city driving.
* Traffic conditions: Heavy traffic drastically reduces average speed.
* Time of day: Rush hour will have lower average speeds.
* Driver behavior: Aggressive driving might lead to higher average speeds (but is unsafe and illegal).
* Type of vehicle: A sports car will likely have a higher average speed than a heavy truck.
* Distance of the trip: A shorter trip might have a lower average speed due to acceleration and deceleration.
While you might find studies giving average speeds for specific contexts (e.g., the average speed on a particular highway during a specific time), there's no universally applicable "average speed of a car."
