The site of the archaeological dig was a Bronze Age, Iron Age and Roman fort, and a Saxon cemetery.
The review is under way after 20 incidents at a level crossing near Ferring in five years.
A girl running in front of a train and a truck tearing off a barrier are among recent incidents.
Three herring gulls have been attacked with air rifle pellets in two weeks, a charity says.
Police seize packages containing suspected drugs which were found on Goring beach.
