This is not really relevant to the Four Lanes End incident, so hopefully a moderator will move it to a new thread.
Unfortunately good visibility for both road and rail users is not good enough to avoid accidents. Even if the train driver can see the crossing is clear as he approaches, somebody might start to cross as he gets closer. If the crossing is going to controlled remotely from Basingstoke, I assume it will be fitted with CCTV, or it may be one of the new MCB-OD (obstacle detection) types, see this thread: viewtopic.php?f=10&t=3467&hilit=lidar
There are already quite a lot of crossings with cameras like speed cameras to catch offenders, but it is still a problem, despite TV advertising campaigns and police crack-downs.