Just down the road from me, I know this stretch of the A14 very well. It's the westbound continuation of the two-lane M11; there is also traffic joining from the left coming from the Newmarket A14 spur. This makes a short stretch of three lane A14, probably no more than 1.5 miles, then the left hand lane 'filters off' to Bar Hill (Tesco) and Longstanton - you can see this from the overhead signs. To add to the complexity, this is exactly where the average speed camera zone starts. It's a place where traffic moving at pace - certainly much of it well in excess of 70, decelerates quickly for the cameras but often there is little room for manoeuvre - I would hazard a guess at this having happened to the car in lane three ahead of the bike. A lot of traffic moves across from lane one into the centre and right hand lanes to continue west on the A14. Notorious accident blackspot and there are often queues at this point of the A14.
Undertaking? I need to do it every day on my way to work, always have done, always will. Second nature to me. I'm certain a lot of my undertaking moves may look similar to what's on camera here; although I prefer to allow myself and others more space.
