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Radar detectors and Tesla glass?

Discussion in 'Tech Talk' started by SoFlaModel3, Apr 22, 2017.

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  1. SoFlaModel3

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    I have searched a bit online and have not found anything definitive, does anyone on here know how radar detectors do with Tesla glass?

    Is it time to bid my Valentine One farewell?

    I suppose the question is actually two-fold:

    1) Does the coating in the glass render the radar detector ineffective

    2) Does autopilot (which uses radar) lead to false alarms (I assume so) and thus even if the detector worked it would be so annoying you would stop using it.

    As an aside, my dad has a brand new Model S, so if anyone isn't sure but is curious I could use his car for some testing.

    Thanks in advance!
     
  2. MelindaV

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    people still use radar detectors?

    1) I know some transmitters (toll passes) don't work thru the glass, but radar is different so don't think it would have the same problems (maybe different ones)
    2) the police radar that radar detectors send out is a different frequency as what vehicles (it's not just Tesla) are sending out
     
  3. Badback

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    AFAIK, Tesla radar operates in the 2.5GHz band, same as other civilian devices like WiFi and GDOs. Police radar operates in the 10GHz band for stationary units (car mounted) and in the 25GHz band for hand held units. So, interference with your radar detector is unlikely because it would have been designed to reject the 2.5GHz frequencies.

    The UV rejection qualities of the Tesla glass is probably due to some mineral added to the glass, or some metalized film sandwiched in the glass layers. I would assume that his would also attenuate radar frequencies. see: https://www.carid.com/articles/radar-detectors.html
     
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    • SoFlaModel3

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      Should come in handy with instant torque and a lead foot ;)

      Thanks!!
       
    • TrevP

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      Illegal in Canada so have no opinion
       
    • SoFlaModel3

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      Ouch, that's a bummer. What is the penalty for being caught with one? What about a concealed mount? Not worth the risk?
       
    • garsh

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      You don't really need radar detectors nowadays. Just run Waze.
       
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      • AEDennis

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        I suppose it would still be useful for cross-country trips. Lots of open spaces out there with no Internet or minimal waze users.
         
      • garsh

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        Then you go old-school, get a CB radio, and listen to the truckers.
         
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        • SoFlaModel3

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          I find Waze to have a very childish user interface and I really don't another reason to allow my phone to distract me. Besides my Valentine One is right 100% of the time and Waze is only as good as the other drivers around me.
           
        • garsh

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          It does. I always go into settings and turn off all of that extra crap.
          The only thing I can't really turn off is showing me gas stations (I drive a Leaf dammit!).
          I found a work-around: Choose a "favorite" gas station brand, but make sure it's a brand that doesn't exist in your part of the country.
          Radar detectors are illegal in some states, and radar detectors don't work for lidar or vascar, while Waze does. ;)
           
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          • SoFlaModel3

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            I will check out turning off the "extras" and see.

            Fortunately radar detectors are legal in Florida.

            The Valentine One does detect laser, though I assume the point you are making is that detecting it simply means confirmation of the ticket you are about to get as it's too late for you.

            The best solution (if legal in your area) is radar detector plus laser jammers, though I've never run laser jammers before.

            My biggest fear with Waze is that you are dependent upon others meaning it simply does not work 100% of the time. Someone has to be the one that first finds something.
             
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            • TrevP

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              Correction, they're illegal in all but 3 provinces...

              https://www.kmph.ca/pages/faq

              $170 fine where I am and the cops employ radar detector detectors. These days most police use LIDAR which is another reason why Ontario has a legal requirement for front plates, gives something for the LIDAR to reflect off of. Still dumb in my opinion (front plates, that is)
               
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              • MelindaV

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                @SoFlaModel3 - I was thinking about this and think one of the reasons I don't see people using radar detectors here (honestly have no idea if they are legal or not) is more that unless you are well outside of the cities here and on a wide open strip of freeway, you have little chance of being pulled over. The state patrol are the only ones stopping excessive speeders. The local city/county police here are stretched too thin to waste their time with traffic stops.
                A while back at a neighborhood meeting a cop was there and he was asked about the constant speeders on a particular 40mph street where cars rarely are under 50 and most closer to 60. He said they have to put their time into crimes and can't have officers wasting their time pulling speeders over.
                 
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                • MelindaV

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                  But it does look like it is illegal to have anything on your windshield in Florida
                  [​IMG]
                   
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                  • MelindaV

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                    And a map including laser jammers
                    [​IMG]
                     
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                    • SoFlaModel3

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                      #17 SoFlaModel3, Apr 23, 2017
                      Last edited: Apr 23, 2017
                      Interesting! Our toll system requires a "sunpass" which is mounted to the windshield. I think every car you pass has something mounted (navigation, phone, radar detector, etc). Very interesting though. For the Tesla, I was going to look at a blendmount kit where it would be attached to the mirror and not the windshield.

                      I guess it's been a while or I never realized they were illegal federally the whole time.
                       
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                      • MelindaV

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                        marajuana is federally illegal too, but you can legally (as the state sees it) buy and use it here, but still subject to it being a federal offense
                         
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                        • JWardell

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                          The M3 will be the first car I will drive without a radar detector in 15+ years.
                          I doubt the glass will have much affect, possibly a 10% attenuation. That's not the issue.
                          The issue is the car generates its own radar. As do many many other vehicles on the road lately.
                          I find even the latest escorts do not do a great job of filtering these out. It's incredibly annoying, and at the minimum you start to ignore your detector as you would a cheap cobra and then it is useless.
                          Even if they could filter perfectly, each transmitter raises the noise floor, and severely limits the ability to pick out a radar gun.
                          Finally, 99% of the time, cops are using laser. Only small towns seem to be using radar any more.
                          As it is, I have already kept my RD off now unless I'm driving around towns on a trip.

                          Laser jammers are still worth their weight in gold, at least until lidar sensors become common on non-tesla autonomous cars. They are NOT illegal. Your TV remote would have to be illegal too...
                           
                        • Gabzqc

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                          As a European, where we dont have Radar as much as the US for speed detection, I simply dont understand what is so hard about keeping to the speed limit.
                          Surely they are there for a safety reason and should be adhered to? What about fuel or battery efficiency better at lower speeds...?
                          You could avoid all of the worry about "is my radar detector working properly" and all the noises in the cab, and just let the car do the driving with cruise control on...

                          And maybe.... M3 will keep the car at the speed limit and not allow overspeed... another safety benefit to add to the long list already on the car...
                           
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