What additional equipment must the ABW have access to during driving sessions?

Access to a second set of reins during driving sessions is crucial for safety and control. In the context of driving sessions, having a second set of reins allows for immediate action if the primary reins fail or if the driver loses control for any reason. This redundancy ensures that the individual in charge can maintain the ability to direct the vehicle effectively, which is particularly important in situations where safety is a paramount concern.

Other options, while they may have their own benefits, do not provide the same level of direct control and safety that a second set of reins offers. For example, a backup vehicle is useful for transportation but does not enhance the control of the current driving session. Extra helmets and a list of emergency contacts contribute to safety and preparedness but do not directly address operational control during the driving itself, which is why the second set of reins is the most critical additional equipment needed during those sessions.