When your vehicle becomes immobilized at a railroad crossing with a warning alarm, what should you use first?

Answer: B: Railroad crossing obstacle detection device

Explanation

Section 2 (1) of Chapter 6, Section 1 of the Rules of the Road states: "At railroad crossings with warning alarms, use the push-button railroad crossing obstacle detection device installed on the alarm post." At crossings with warning alarms, the obstacle detection device is the first option.