This picture of tracks in Lakehurst, New Jersey looks quite intriguing. Can you guess what they are for?
in order for a plane to safely land on an aircraft carrier without racing off the end, its tailhook needs to be 'caught' by arresting cables attached to the carrier's deck (see here). these cables need to be extremely strong and durable but also flexible enough so as not to stop the plane too quickly. these 5 test tracks, located at navair in lakehurst, are dedicated to testing these very systems and the emergency barricades.
See more pictures of vehicle testing facilities at deputy dog. http://deputy-dog.com/2009/04/record-breaking-jet-sleds-and-rooftops.html
http://www.youtube.com/watch?v=t0eHWOVjDSw