What is the acceptable range of speed deviation for a speed check above 30 MPH?

The acceptable range of speed deviation for a speed check above 30 MPH is ±5 MPH. This standard allows for a reasonable margin of error in the measurement of speed, accounting for potential variations that can occur due to factors such as equipment calibration, environmental conditions, and operational circumstances. In rail operations, maintaining speed within appropriate limits is crucial for safety and efficiency.

A deviation of ±5 MPH ensures that the actual speed of the train remains close enough to the intended speed without compromising safety protocols. This range is specifically set to balance safety considerations with operational flexibility, particularly at higher speeds where small deviations can still have significant effects. Adhering to this standard helps ensure compliance with regulations and supports the overall safety culture within the rail industry.