Crest Speed
- The maximum speed attained by the vehicle during its running is called as crest speed.
 
Average Speed
- The mean or average speed of the vehicle during from start to stop is called as average speed.
 - It is distance covered between two stops divided by the actual time of run.
 
Average speed = Distance between two stops / Average time of run
Schedule Speed
- It is defined as the ratio of the distance covered between two stops and total time of run include time of stop is called as schedule speed.
 
Schedule speed = Distance between two stops / [ Actual time of run + Stop time ]
- The schedule speed is smaller than the average speed. 
 
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