Sunny, I used the 14 very often, it's one of many that these cases often happen, the problems that can be cause by motorist's is the movement within the trailer / tautliner, loads can often move within the trailer in a forward / sideway direction even with the load being strapped, been there & seen the video, I'm sure we have all been in a situation that can cause this, I was trained & with experience to read the road & a lot of motorist's do not do this, the result, causing the motorist to get trapped by the traffic joining in from their left.