A flat spot that is less than 2 1/2 inches in length or if there are 2 adjoining spots, each less than 2 inches in length the train may proceed/continue at?

A flat spot that is less than 2 1/2 inches in length or if there are 2 adjoining spots, each less than 2 inches in length the train may proceed/continue at?

• A. Normal Speed
• B. 25 MPH
• C. 15 MPH
• D. 5 MPH

Answer: (A)

Small wheel flats that are minor don’t require slowing the train down. If a flat spot is less than 2 1/2 inches, or if there are two adjoining spots each less than 2 inches, the wheel’s irregularity is considered acceptable for moving at normal speed. These thresholds exist because such small defects typically don’t significantly affect wheel-rail contact or ride quality. If the flat spots exceeded those limits, a speed reduction would be required (to the lower speeds listed in the rules). So, with the described small defect, the train may proceed at normal speed.

Small wheel flats that are minor don’t require slowing the train down. If a flat spot is less than 2 1/2 inches, or if there are two adjoining spots each less than 2 inches, the wheel’s irregularity is considered acceptable for moving at normal speed. These thresholds exist because such small defects typically don’t significantly affect wheel-rail contact or ride quality. If the flat spots exceeded those limits, a speed reduction would be required (to the lower speeds listed in the rules). So, with the described small defect, the train may proceed at normal speed.