Crash investigators were measuring distances, testing road surfaces and photographing the scene of a fatal motorbike accident outside Chessington World of Adventures.
The crash took place at about 11.10am this morning on the A243 directly outside the theme park.
An eye-witness, who asked not to be named, has told the Surrey Comet she saw the purple motorbike hit a traffic island and its rider disappear beneath the wheels of a petrol truck.
A man was treated by London Ambulance but died in the road.
The road is still closed off from outside Chessington Community College up to the exit of the theme park.
Coaches of schoolchildren were able to leave the car park this afternoon, apparently unaware of the accident, either heading out to the M25 or back towards Chessington.
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