I would call it current speed, not average speed.
No, current speed is.
The driver is checking the current speed of the vehicle, as indicated by the speedometer.
no
instantanous speed
instantaneous speed
instantaneous speed.
No. Instantaneous speed is shown on the speedometer.
It reads instantaneous speed, and tells you nothing about average speed.
It shows instantaneous speed.
In a car, the speedometer measured Instantaneous speed. This comes from the assumption that the car does not slow down and speed up fast enough for the speedometer to be able to give an average of the changing speed.
It reads instantaneous speed, and tells you nothing about average speed.
It reads instantaneous speed, and tells you nothing about average speed.
The average speed of the vehicle relative to the road.