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Re: OT: Railroad question
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Posted by Mort Adella on December 27, 2006 at 09:01:18 from (74.37.155.156):
In Reply to: OT: Railroad question posted by Howard H. on December 27, 2006 at 08:57:45:
As easy as a entry into google search and then a click on any return you choose. Track warrant From Wikipedia, the free encyclopedia Jump to: navigation, search Track warrants are systematized permissions used on some rail lines instead of or in addition to signals. Train crews communicate by radio with the dispatcher and receive track warrants either for a certain distance (the warrant covering the beginning and ending mileposts of this section) or period of time. Maintenance crews also receive track warrants (usually called "Form B's") in order to perform track work that would otherwise be interrupted by passing trains. Contents [hide] 1 X-Boxes 2 Use 3 See also 4 References [edit] X-Boxes Most track warrants in the U.S. follow a standard form as suggested by the General Code of Operating Rules, consisting of several "X-Boxes" to mark specific notes or conditions for a warrant. These vary from temporary speed restrictions to rules regarding meeting other trains.
Box 1- Void on a previous warrant Box 2- Proceed from point to point Box 3- Proceed from point to point (cont.) Box 4- Work between certain limits Box 5- Not in effect until ____ Box 6- Authority expires at ____ Box 7- Not in effect until after the arrival of ____ at ____ Box 8- Hold main track at last named point Box 9- Do not foul limits ahead of ____ Box 10- Clear main track at last named point Box 11- Between ____ and ____ make all movements at restricted speed: limits occupied by train Box 12- Between ____ and ____ make all movements at restricted speed: limits occupied by men or equipment Box 13- Do not exceed ____ mph between _____ and ____ Box 14- Do not exceed ____ mph between _____ and ____ Box 15- Flag protection not required against following trains on same track Box 16- Track bulletins in effect Box 17 and 18- Other specific instructions [edit] Use As an example, the BNSF Railway uses track warrants on the "El Paso Sub" line which runs from Belen, New Mexico to El Paso, Texas, with the dispatcher in Fort Worth, Texas. Track warrants are used on the railroad's Harbor Subdivision in Southern California as well, though infrequently since operations on the line were reduced in 2002. There are no electrical signals on either route. Some smaller Class II railroads, such as the Iowa Interstate Railroad, and many Class III railroads are dispatched completely by track warrant. [edit] See also Rail terminology Centralized traffic control Direct traffic control Train order
[edit] References Trainweb GCOR Railroad Controls GCOR Illustration of Track Warrant Control This rail-related article is a stub. You can help Wikipedia by expanding it.
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