What is the maximum allowable speed for trains when the temperature drops to -22 degrees Fahrenheit?

In cold weather conditions, especially when temperatures drop significantly, railroads implement speed restrictions to ensure safety and maintain the integrity of the tracks and equipment. At -22 degrees Fahrenheit, the maximum allowable speed for trains is set at 30 MPH. This is a precautionary measure to account for the risk of track and rail performance problems that can arise in extreme cold, such as brittle steel and potential track constriction.

By setting the speed limit at 30 MPH in such temperatures, the railroad ensures that trains can operate safely while minimizing the risk of incidents. This speed also allows crews to have sufficient time to react to any potential issues that may arise due to the colder conditions impacting the trains' performance or the track's structure.