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| Re: Canarsie CBTC (100189) | |||
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Re: Canarsie CBTC |
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Posted by RonInBayside on Sat Jun 18 00:14:24 2005, in response to Re: Canarsie CBTC, posted by Stephen Bauman on Fri Jun 17 19:52:12 2005. "CBTC does not handle switching."You missed my point, which was that GPS accuracy would be insufficient to keep adjacent trains as separate objects - it's a little like watching two airplanes merge on a radar scope (leaving aside the transponders for a moment). GPS can supply position information (and if you have updated position information, then you can also calculate velocity). Your points about track assignments are correct; GPS could reduce the investment you'd need in wayside equipment. "How much of your own money will you put up, for the test?" A test like this would be well worth an investment from the US Dept. of Transportation. By definition that would involve my tax dollars (and yours). If the experiment fails we still will have learned a lot (actually we learn more from failures than we do from successes). Why not take some chances? Are you that risk averse? The Mercury and Gemini programs took a lot of risks that, in the retrospectoscope, look insane today. But look at the dividends they paid. |
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