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Re: DOT press release re: proposed changes to PTC regs, GPS
Author: Richard Elgenson
Date: 08-23-2011 - 22:16

The Feds turned off "selective availability" for GPS nearly 10 years ago. My little tiny Garmin eTrex is accurate to within 33 feet. Professional GPS applications, such as for land surveyors, is accurate to within .1 of a foot. That's right, one-tenth of a foot, or, an inch and one quarter.

The Alaska Railroad was working on some type of collision avoidance system within the last 3-5 years. I do not believe it is deployed. Anyone else know about this system?

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Subject Written By Date/Time (PST)
  DOT press release re: proposed changes to PTC regs OPRRMS 08-23-2011 - 11:16
  Re: DOT press release re: proposed changes to PTC regs Rich Hunn 08-23-2011 - 14:15
  Re: DOT press release re: proposed changes to PTC regs Dragoman 08-23-2011 - 14:58
  Re: DOT press release re: proposed changes to PTC regs OPRRMS 08-23-2011 - 15:08
  Re: DOT press release re: proposed changes to PTC regs Dr Zarkoff 08-23-2011 - 18:42
  Re: DOT press release re: proposed changes to PTC regs, GPS Richard Elgenson 08-23-2011 - 22:16
  Re: DOT press release re: proposed changes to PTC regs, GPS BOB2 08-24-2011 - 12:48
  Re: DOT press release re: proposed changes to PTC regs, GPS Rich Hunn 08-24-2011 - 14:57
  Re: DOT press release re: proposed changes to PTC regs, GPS Dr Zarkoff 08-24-2011 - 18:56
  Re: DOT press release re: proposed changes to PTC regs, GPS Rich Hunn 08-25-2011 - 06:01
  Re: DOT press release re: proposed changes to PTC regs, GPS crmeatball 08-25-2011 - 07:13
  Re: GPS and PTC? Too much reading? BOB2 08-25-2011 - 09:00
  Re: GPS and PTC? Too much reading? crmeatball 08-25-2011 - 09:48
  Re: GPS and PTC? Too much reading? Dr Zarkoff 08-25-2011 - 10:26
  Re: GPS and PTC? Too much reading? Dr Zarkoff 08-25-2011 - 10:23
  Re: GPS and PTC? Too much reading? OldPoleBurner 08-25-2011 - 11:57
  Re: GPS and PTC? Too much contract steering? BOB2 08-26-2011 - 09:27


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