It can be done, as most cars are speed governed. Altering the parameters of the ECM is done with software typically available only to dealerships and fleets with large numbers of those vehicles and which have their own maintenance facilities.
This question makes no sense, what do you mean? the speed of the car does not dictate the posted speed limit.
Whatever the posted speed limit is.
a car traveling the speed limit
The average speed of any car should be the posted speed limit.
It means the absolut limit to go on a car
Changing the speed limit should be considered based on factors like road conditions, traffic flow, and safety data. Conducting a thorough evaluation and consulting with traffic engineers and local authorities can help determine if a change is necessary to improve safety and efficiency on the road.
The speed limit is exactly that. The LIMIT. Driving faster than the limit can get you a ticket. So, No.
No. You're still bound by the speed limit.
Generally, the average car speed is whatever the speed limit is. While some go over and under, others stay right on the speed limit, making it the average.
In most states it is the passenger car speed. Some states make them go the posted truck speed limit.
Whatever the posted speed limit is.
Do the speed limit.