This is an interactive double track offset swing bridge based on the span over the Ouse River
about 12 miles south of York. This is is designed to be triggered to open when some form of water traffic which has been
set up as a locomotive comes within the trigger radius on the 2 invisible tracks in the water. This takes 450 keyframes
(approximately 15 seconds) to close so don't drive too fast. Many thanks to ECML Stuart for the pics and info.
The blue invisible track is at ground level (z axis = 0 ft 0.0 in).
The green invisible track is at z axis = -10 meters (-32 ft 9.0 in) below ground level.
Water level should be set at -3 meters (-9 ft 10 in) below ground level.
IMPORTANT! Rail traffic across the bridge can be made interactive in Surveyor. See the README file in the folder for instructions.