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[quote]QUOTE: Originally posted by CSSHEGEWISCH FM should also be aware that GPS for civilian use is only accurate to about 10-15 feet of actual position, insufficient accuracy to determine which track on a multiple-track main line. Is GPS enough of an improvement over existing systems to justify the expense of installation or is it a case of hi-tech for its own sake? [/quote] 1. I would grant you that GPS is a lot cheaper than installing new CTC/ABS. 2. GPS could work in conjunction with EOT radar and lead unit radar detection, which would be activated if a lead consist slows below a safe speed range, or if it stops on the main, and would deactivate once a consist clears a siding. The point is, GPS wouldn't necessarily have to work alone to achieve the desired capacity improvements.
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