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mileena202 Champion Author Oakland Posts:2,718 Points:550,510 Joined:Nov 2011	Message Posted: Mar 12, 2012 11:31:10 AM Ignore mileena202 Report Abuse Every time I pass by a police radar detector that displays your speed, mine always is displayed as 2-4 mph less than what my speedometer shows. BTW, I have to rely on these as California does not have mileage markers on the highway.

mileena202

Champion Author
Oakland

Posts:2,718
Points:550,510
Joined:Nov 2011

Message Posted: Mar 12, 2012 11:31:10 AM

Ignore mileena202 Report Abuse

Every time I pass by a police radar detector that displays your speed, mine always is displayed as 2-4 mph less than what my speedometer shows.

BTW, I have to rely on these as California does not have mileage markers on the highway.

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FuelPump Champion Author Los Angeles Posts:21,609 Points:3,442,700 Joined:Apr 2003	Message Posted: Jul 15, 2012 10:19:40 AM Ignore FuelPump Report Abuse Factory specs say within 5% + or -.
Banjoe Champion Author Winnipeg Posts:4,461 Points:641,595 Joined:Apr 2011	Message Posted: Jul 15, 2012 9:11:27 AM Ignore Banjoe Report Abuse Way off and it's a new car. It's indicating 5% high so my warranty will be running out that much sooner. On the other hand, it keeps me under the speed limit so maybe saving money on tickets.
RNF Champion Author Indiana Posts:7,203 Points:2,900,355 Joined:Jun 2004	Message Posted: Jul 15, 2012 9:09:16 AM Ignore RNF Report Abuse Yes
SilverBTX Champion Author Houston Posts:3,121 Points:791,745 Joined:Jul 2008	Message Posted: Jul 15, 2012 8:47:01 AM Ignore SilverBTX Report Abuse Yes
jessjames Champion Author Huntsville Posts:15,439 Points:3,331,910 Joined:Jun 2003	Message Posted: Jul 15, 2012 8:45:00 AM Ignore jessjames Report Abuse Yes
Titanic1985 Champion Author South Carolina Posts:6,538 Points:375,280 Joined:Dec 2010	Message Posted: Jul 15, 2012 8:43:10 AM Ignore Titanic1985 Report Abuse Yes, as compared with a GPS readout.
EdPG Champion Author Boston Posts:12,326 Points:2,696,685 Joined:Jul 2005	Message Posted: Jul 15, 2012 7:09:16 AM Ignore EdPG Report Abuse right on!
FieroGT Champion Author Twin Cities Posts:14,464 Points:2,531,560 Joined:Mar 2005	Message Posted: Jul 15, 2012 7:01:33 AM Ignore FieroGT Report Abuse Yes
KentuckyWildcat Champion Author Maryland Posts:9,302 Points:2,213,305 Joined:Mar 2005	Message Posted: Jul 13, 2012 7:40:08 AM Ignore KentuckyWildcat Report Abuse Yes
Seamus4513 Champion Author Orange County Posts:2,725 Points:414,280 Joined:Mar 2012	Message Posted: Jul 12, 2012 11:53:33 PM Ignore Seamus4513 Report Abuse Yes
ericli3091 Veteran Author Ottawa Posts:394 Points:130,325 Joined:Nov 2011	Message Posted: Jul 12, 2012 10:08:16 AM Ignore ericli3091 Report Abuse ya
Vin63 Champion Author San Bernardino Posts:1,890 Points:465,295 Joined:Oct 2007	Message Posted: Jul 12, 2012 10:04:52 AM Ignore Vin63 Report Abuse Yes.
DesertRat2011 Champion Author Riverside Posts:3,761 Points:512,280 Joined:Jun 2011	Message Posted: Jun 22, 2012 10:34:35 AM Ignore DesertRat2011 Report Abuse No is off high by 5 mph at 70 because of larger than stock tires
jorobins538 Champion Author Chicago Posts:4,742 Points:643,570 Joined:Sep 2009	Message Posted: Jun 21, 2012 2:04:50 PM Ignore jorobins538 Report Abuse seems to be right on.
Skateforgirl Rookie Author Long Island Posts:99 Points:30,080 Joined:Feb 2012	Message Posted: Jun 21, 2012 1:26:49 PM Ignore Skateforgirl Report Abuse I drive a Honda. Ive noticed the Hondas are dead accurate with the speed readers on school zones. I notice that when I drive the parents Volkswagens, they are higher by 3-4 MPH.
steffy628 Champion Author Pennsylvania Posts:1,911 Points:477,975 Joined:Apr 2011	Message Posted: Jun 21, 2012 12:47:14 PM Ignore steffy628 Report Abuse Yes
kevrob1972 Champion Author Maine Posts:1,004 Points:634,225 Joined:Apr 2011	Message Posted: Jun 21, 2012 10:44:56 AM Ignore kevrob1972 Report Abuse yes.
TheRavenHeart Veteran Author Chattanooga Posts:359 Points:41,945 Joined:Apr 2012	Message Posted: Jun 21, 2012 10:42:42 AM Ignore TheRavenHeart Report Abuse I don't take stock in the roadside radars, only my own speedometer and my GPS. My speedometer is the standard dial type, and as far as I can tell, its pretty well spot on to my GPS.
gator2002 Champion Author Calgary Posts:11,151 Points:2,595,025 Joined:Jul 2003	Message Posted: Jun 21, 2012 10:25:09 AM Ignore gator2002 Report Abuse Yes
hornet17 Champion Author Vancouver Posts:1,323 Points:440,865 Joined:Aug 2011	Message Posted: Jun 21, 2012 9:57:42 AM Ignore hornet17 Report Abuse I have never checked it against a known good source like a GPS.
FieroGT Champion Author Twin Cities Posts:14,464 Points:2,531,560 Joined:Mar 2005	Message Posted: Jun 21, 2012 9:56:56 AM Ignore FieroGT Report Abuse Yes, surprisingly accurate.
bearone2 Champion Author Phoenix Posts:3,450 Points:1,620,420 Joined:Sep 2005	Message Posted: Jun 21, 2012 9:53:28 AM Ignore bearone2 Report Abuse yes
randdtso Champion Author Ontario Posts:2,145 Points:273,215 Joined:Nov 2006	Message Posted: Jun 21, 2012 9:43:56 AM Ignore randdtso Report Abuse No Idea!
OceanArcher Champion Author Mississippi Posts:5,843 Points:1,355,100 Joined:May 2004	Message Posted: Jun 21, 2012 9:20:49 AM Ignore OceanArcher Report Abuse Mileena202 -- Agreed, they do not have a specialized sign saying "mile xxx", but there are markers along side the road that do have that info. You need to do a little research ......
BUSSY Champion Author Dallas Posts:10,045 Points:1,565,190 Joined:Oct 2006	Message Posted: Jun 21, 2012 9:16:06 AM Ignore BUSSY Report Abuse yes
wlotocky All-Star Author Florida Posts:815 Points:207,085 Joined:May 2010	Message Posted: Jun 21, 2012 9:04:37 AM Ignore wlotocky Report Abuse yes
MertieMan Champion Author Lexington Posts:14,928 Points:2,923,310 Joined:May 2005	Message Posted: Jun 21, 2012 8:44:51 AM Ignore MertieMan Report Abuse Test it for 60 seconds at 60 mph on the interstate and if you go exactly one mile then your speedometer is reading correctly. I would not put much faith in those street mobile radar detectors.
vikings80 All-Star Author South Dakota Posts:781 Points:110,065 Joined:Aug 2008	Message Posted: Jun 21, 2012 8:42:00 AM Ignore vikings80 Report Abuse yes
captain013 Champion Author Maryland Posts:2,154 Points:487,105 Joined:Sep 2011	Message Posted: Jun 21, 2012 8:17:01 AM Ignore captain013 Report Abuse Both cars read three over actual based on those highway safety speed limit radar machines.
kxy4fw Champion Author Denver Posts:1,226 Points:275,355 Joined:Nov 2011	Message Posted: Jun 21, 2012 8:00:13 AM Ignore kxy4fw Report Abuse yes
fkftdoc Champion Author Kentucky Posts:1,907 Points:603,075 Joined:Jun 2011	Message Posted: Jun 21, 2012 7:34:35 AM Ignore fkftdoc Report Abuse yes
russells350 Champion Author Montreal Posts:3,021 Points:633,020 Joined:Apr 2008	Message Posted: Jun 21, 2012 7:25:07 AM Ignore russells350 Report Abuse yes
puddy Champion Author Wisconsin Posts:13,789 Points:3,294,625 Joined:Dec 2003	Message Posted: Jun 21, 2012 6:54:46 AM Ignore puddy Report Abuse yes
SilverBTX Champion Author Houston Posts:3,121 Points:791,745 Joined:Jul 2008	Message Posted: Jun 21, 2012 6:54:01 AM Ignore SilverBTX Report Abuse Yes
RacerGene Champion Author Alabama Posts:1,703 Points:366,225 Joined:Jan 2012	Message Posted: Jun 21, 2012 6:24:36 AM Ignore RacerGene Report Abuse just a little off
GeorgeNews Champion Author New Jersey Posts:6,563 Points:1,481,165 Joined:Mar 2003	Message Posted: Jun 14, 2012 4:55:39 PM Ignore GeorgeNews Report Abuse yes
SilverBTX Champion Author Houston Posts:3,121 Points:791,745 Joined:Jul 2008	Message Posted: Jun 14, 2012 4:38:07 PM Ignore SilverBTX Report Abuse Yes
Titanic1985 Champion Author South Carolina Posts:6,538 Points:375,280 Joined:Dec 2010	Message Posted: Jun 14, 2012 4:10:20 PM Ignore Titanic1985 Report Abuse My 2 week old 2012 Chevrolet Sonic with a Digital (displays speed in numbers) speedometer matches my GPS exactly.
sweeteddy Champion Author Indianapolis Posts:3,644 Points:1,708,820 Joined:Aug 2006	Message Posted: Jun 13, 2012 10:21:54 PM Ignore sweeteddy Report Abuse yes
carinthuist Champion Author San Francisco Posts:2,378 Points:356,140 Joined:Mar 2012	Message Posted: Jun 13, 2012 9:47:20 PM Ignore carinthuist Report Abuse yes.
manaknight14 All-Star Author Pennsylvania Posts:545 Points:451,775 Joined:Oct 2011	Message Posted: Jun 13, 2012 9:34:33 PM Ignore manaknight14 Report Abuse My speedometer is definitely off. I think it shows me going about 7% faster than I actually am. I noticed this because I try to drive with the needle right at the speed limit, but one time when my fiancée was following me in another car, she had her cruise control set at the speed limit and nearly ran up my tailpipe. I think it may have started after an incident where two of my tires got slashed and I had them quickly replaced with used tires in a pinch. Those tires might have been the wrong size, hence the error.
NYTEFLYT All-Star Author New York Posts:842 Points:336,220 Joined:Feb 2012	Message Posted: Jun 13, 2012 9:28:38 PM Ignore NYTEFLYT Report Abuse Only if I'm doing less than the speed limit!
eccerr0r Champion Author Fort Collins Posts:1,032 Points:617,335 Joined:Apr 2011	Message Posted: Jun 13, 2012 8:26:16 PM Ignore eccerr0r Report Abuse Yeah I think they do that to auto speedometers just to make sure you can't use the speedometer as an excuse as to why you're speeding (that would mean it's really the manufacturer's fault for your ticket, and they sure don't want to pay your tickets). Plus as your tires wear, it will become slower compared to the same speedometer speed. IIRC all of my cars are like this, and usually I test against handheld GPS if I can't find a handy radar detector.
franz1313 Veteran Author Providence Posts:299 Points:193,405 Joined:Apr 2012	Message Posted: Jun 13, 2012 7:45:35 PM Ignore franz1313 Report Abuse My Mazda 3. Yes. My Jetta. No. Thankfully it reads 2-4 mph fast.
pavel809 Sophomore Author Miami Posts:228 Points:74,030 Joined:Nov 2011	Message Posted: Jun 13, 2012 7:23:37 PM Ignore pavel809 Report Abuse 100% accurate
diesdown Champion Author North Carolina Posts:1,746 Points:532,300 Joined:May 2011	Message Posted: Jun 13, 2012 6:20:03 PM Ignore diesdown Report Abuse Yes.
gasmaker Sophomore Author Ohio Posts:136 Points:27,700 Joined:May 2012	Message Posted: Jun 13, 2012 5:57:16 PM Ignore gasmaker Report Abuse yea
KentuckyWildcat Champion Author Maryland Posts:9,302 Points:2,213,305 Joined:Mar 2005	Message Posted: May 27, 2012 8:01:18 AM Ignore KentuckyWildcat Report Abuse Pretty close
jessjames Champion Author Huntsville Posts:15,439 Points:3,331,910 Joined:Jun 2003	Message Posted: May 27, 2012 7:48:23 AM Ignore jessjames Report Abuse Yes
russells350 Champion Author Montreal Posts:3,021 Points:633,020 Joined:Apr 2008	Message Posted: May 27, 2012 7:37:18 AM Ignore russells350 Report Abuse yes