What mph must trains in sidings not listed on the track warrant not exceed?

• A. 5 mph
• B. 10 mph
• C. 15 mph
• D. 20 mph

Answer: (B)

When you’re in a siding that isn’t listed on the track warrant, you must proceed at a very low speed to safely manage the unique risks in that area. Sidings often have switches, turnout points, and workers or equipment nearby, and you can’t rely on the same protections as on the main tracks. A conservative speed limit gives you enough time to observe, respond to any unexpected movements, and stop if needed before reaching a turnout or obstacle.

The standard limit in this situation is ten miles per hour. That speed provides a safe margin for handling switch operations and any caught-by-sight hazards in the yard environment, without rushing through potentially unpredictable turning points. If the siding were listed on the warrant, you’d follow the specified speed there, but for unlisted sidings, ten mph is the safe default.