What best describes restricted speed?

• A. Proceed prepared to stop within one half the range of vision short of a train, engine, railroad car, roadway workers or equipment fouling the track, stop signal, derail or switch lined improperly, and not exceed 20 MPH
• B. Proceed at a fixed speed under 25 MPH at all times
• C. Only move when signaled to proceed
• D. Speed must not exceed 40 MPH under any circumstances

Answer: (A)

Restricted speed means you move only as fast as you can stop within half the distance you can clearly see ahead, and you must not exceed 20 mph under conditions that require extra caution because of hazards on or near the track. The idea is that if something unexpected appears—such as a train, engine, railroad car, roadway workers or equipment fouling the track, a stop signal, or a misaligned switch or derail—you have enough time to stop safely within the visible range. The 20 mph limit is the maximum for this operating condition, reflecting the need for heightened readiness and control when visibility or track conditions are compromised.

Other statements miss the mark because restricted speed isn’t a fixed, universal number you always follow, like a flat 25 mph or 40 mph limit; it depends on visibility and the specific hazards, with 20 mph being the typical ceiling in these scenarios. It also isn’t merely about waiting for a signal to proceed; even when authorized to move, you must adhere to the restricted-speed standard.