Question: what tools are used to measure speed?
Answer: Tachometers for Engine Speed. Tachometers measure the engine speed in revolutions per minute (rpm). ... 
Speedometers for Travelling Speed. ... 
Accelerometers for Measuring Acceleration and Deceleration. ... 
RADAR for Determining Vehicle Speed. ... 
LIDAR for Determining Vehicle Speed. ... 
Average Speed Computers 81. ... 
Anemometer 46.