What is the maximum speed a man-trip can be operated?

• A. 12 MPH
• B. 6 MPH
• C. 20 MPH
• D. 8 MPH

Answer: (A)

Safety when moving workers in a man-trip relies on staying within a speed that allows the operator to stop quickly and keep control, even with a loaded car traveling through underground tunnels, slopes, and curves. The limit is set by safety regulations to ensure stopping distances, braking performance, and handling are all within safe margins given the vehicle’s mass, track conditions, and potential pedestrians or other equipment on the route.

Choosing a speed at or below that regulatory maximum keeps the ride predictable and reduces the risk of derailment, collision, or injury if a sudden obstacle appears. Going faster than the limit would stretch braking distance and make it harder to react in time, while speeds well below the limit would hamper productivity without added safety benefit.

So the correct choice is the one that aligns with the established maximum allowable speed for man-trips under mine safety rules.