Which of the following is a method to position a vehicle at a road traffic collision (RTC) on a motorway?

In the context of positioning a vehicle at a road traffic collision (RTC) on a motorway, the method of "fend off" is particularly appropriate. Fending off involves positioning the emergency vehicle in such a way that it creates a buffer zone between the scene of the accident and the oncoming traffic. This is essential for ensuring the safety of both the first responders and any victims involved. It helps to provide a barrier to protect the scene and allows responders to work more efficiently without the immediate danger of fast-moving traffic.

This technique is critical on motorways, where vehicles travel at higher speeds, and the risk of a secondary collision is significant. Proper vehicle positioning can prevent further accidents and provide a safe working environment for emergency responders.

On the other hand, other methods such as following behind, performing U-turns, or parking sideways are not effectively suited for the dynamics of a motorway setting. Following behind may not allow for proper safety measures, U-turns are impractical and potentially hazardous in high-speed environments, and parking sideways does not provide an adequate protective buffer or maintain the necessary traffic flow. Thus, the use of "fend off" is a tactical choice aimed at maximizing safety for all parties involved in the incident.