Know the road
I live a couple of miles down the road from the site.
Just to put a couple of things straight. The van was parked in a place that it often parks, alongside a busy dual carriageway but off the road. Leading to the site the road is straight, there are no corners but there is a flyover which I believe the rider was on at the time of the accident.
There is a 50MPH limit along the road which has been in operation for a few years with trials to reduce this to 40. There are static cameras also along this stretch.
Despite the fact that this is a busy road, (often there's no run off or hard shoulder for immobile vehicles to pull off onto) people still feel a need to exceed the speed limit between the cameras and as the road leaves town it has a busy junction which is joined by shoppers from the nearby superstores and shopping centres.
The area is dangerous. The footballer Aaron Flahavan was killed at roughly the same spot and a couple of miles up the road a recovery truck driver was also killed as was an air hostess. The limit is there for a very good reason.
my understanding is that the biker was travelling over the flyover at the time. You can't see the speedcamera (which is parked about half a mile up the road) until you crest the rise.
It's a tempting road. Riding my own 750 Gixer along there it is difficult to keep to the limit, but you have to be aware, as with any road that there are dangers and ride within yourself. The fact that there was a cameravan there is irrelevant. I've seen broken down cars, cyclists, tractors and even once a drunk wandering along the road. Once someone sat at the top of the flyover and threatened to throw themselves off and there were police and counsellors trying to persuade him not to jump.
If you can't see far enough to make sure you can stop safely then you need to slow down. If not for your sake then for the sake of the person you hit.