USAF TSgt C-17 Aircraft Maintenance Flying Crew Chief & Flightline Avionics Craftsman
Deshler Ohio-crossroads of the B&O Matt eats your fries.YUM! Clinton st viaduct undefeated against too tall trucks!!!(voted to be called the "Clinton St. can opener").
QUOTE: Originally posted by CHPENNSYLVANIA I have an idea. Why dont people drive safer??
QUOTE: Originally posted by mucable Instead of installing expensive detection devices at every crossing, wouldn't it be cheaper, easier and more effective to install radar detection devices on the locomotives that would at least give the crew a warning that there is an obstruction ahead? Some of the wheel-slip technologies already do that with a downward-looking radar, and the automakers are working on smart cruise-control that uses radar to give a vehicle situational awareness. [?]
Never too old to have a happy childhood!
QUOTE: Originally posted by daveklepper More to the point: Being a fairly respected sound system designer, I have some familiarity with the closed circuit TV trade as well, and read SOUND AND VIDEO CONTRACTOR and SOUND AND COMMUNICATIONS regularly. So my estimates and design won't be far from what is real: Cost: ONLy about $20,000 per crossing If only 20-25 crossings are observed by one supervisor, than one screen for each crossing. Up to 500 crossings by one supervisor, one regular screen and one for backup, the regular screen scrolling to give a 10 second snapshot of each crossing in turn. The second screen is backup for the first, also lights up if there are two blockages at once. The wave-pattern recognition digital equipment recognizes when there is a fixed object in the square, rectangle, or parallelogram that is the actual crossing. This can be a car, truck, or bus, or also a train stopped and blocking the crossing. At that point an alarm is activated to call the supervisor's attnetion. A red light next to the screen in a multi-screen installation, and with the single screen, it stops on the affected crossing and stays there until released by the supervisor. Presumably, the supervisor has radio or telephone contact with all train crews and dispatchers and can take the necessary action. No it would not be worthwhile for a crossing in Kansas where one farmer crosses the tracks twice each week. But for all crossings on Metrolink, or Chciago's Metra? I don't think you can buy as much ADDED protection for crossings by any other technique. And it keeps railroads running the way they are now and not investing in something replacing all those cabcars.
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