Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site we53.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!mgnetp!we53!bmt From: bmt@we53.UUCP ( B. M. Thomas ) Newsgroups: net.auto Subject: Re: speedometer calibration and radar Message-ID: <288@we53.UUCP> Date: Sat, 2-Mar-85 17:09:46 EST Article-I.D.: we53.288 Posted: Sat Mar 2 17:09:46 1985 Date-Received: Sun, 3-Mar-85 05:16:38 EST References: <714@inuxd.UUCP> <237@gcc-bill.ARPA> Organization: AT&T Technologies - St. Louis Missouri Lines: 9 The error in a speedometer's calibration is rarely if ever a fixed offset. Rather, a ratio of error is present, which makes it greater at higher speeds. I was ticketed for doing 52 when I happened to be watching my speedometer stay very close to 40. Obviously, I checked the calibration immediately and found that when my speedometer said 30, my dad's, which I was following very closely, said I was doing about 40. It is very possible that your speedometer was in error by this much, in fact, the commonness of this state of affairs is one reason that a lot of police officers give you as much as a 10 mph leeway.