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Speed limits and EVs

Discussion in 'Energy, Environment, and Policy' started by brianman, Sep 15, 2013.

  1. brianman

    brianman Burrito Founder

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    I had this idea on the way home today as I was wishing that I could add 5-10mph to my current speed without risking a more expensive ticket:

    SpeedLimits.png


    This is a very easy way to promote EV transport. It might even get the attention of older auto makers as customers like to get places more quickly, and drive faster doing so.
     
  2. SCW-Greg

    SCW-Greg Active Member

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    Where's the "like" button on this thing?! :)
     
  3. gg_got_a_tesla

    gg_got_a_tesla Model S: VIN P65513, Model 3 Res Holder

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    It's probably the case that most other EVs will run out of juice too quickly at 80 mph to get anywhere. Brian, you might as well say "TESLA SPEED LIMIT" up there ;)
     
  4. brianman

    brianman Burrito Founder

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    Ah, but you're missing the beauty of it.

    I bet that if this became reality we would quickly see some Tesla competitors in the "EV that goes 80+mph for more than 5 minutes" category.
     
  5. Raffy.Roma

    Raffy.Roma Active Member

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    @brianman

    Very good idea. Are you going to set or propose these speed limits for real in the USA?
     
  6. deonb

    deonb Active Member

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    Brilliant idea. Best and cheapest way to promote EV adoption I've seen to date. Will probably do more for EV's (at least for Tesla) than the federal tax credit!

    You should send it to Elon somehow.
     
  7. Raffy.Roma

    Raffy.Roma Active Member

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    Agree 100%
     
  8. andrewket

    andrewket 2014 S P85DL, 2016 X P90DL (soon 100)

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    Having traffic on the same road with a legal 20mph spread will result in a 40mph spread. I suspect that would prove disastrous.
     
  9. Raffy.Roma

    Raffy.Roma Active Member

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    But I guess that in brianman's view the new speed limits would apply only on roads with a speed limit of 60mph.
     
  10. mknox

    mknox Well-Known Member

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    Remember that the word "Limit" in "Speed Limit" means "Maximum Speed Limit". I believe the "Minimum" speed limit on a 60 MPH freeway is 40 MPH. So in this scenario you could have vehicles driving between 40 and 80 MPH... not a good idea in my view.

    This is what the signs look like where I live. It's amazing how many people interpret the word "Maximum" to mean "Minimum" :smile:

    1334518355717_ORIGINAL.jpg
     
  11. stevezzzz

    stevezzzz R;SigS;P85D;SigX

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    The spread on the Autobahn is more like 80 mph, and the Germans manage to make it work...mostly. But drivers in the US don't have the required lane discipline, IMO.
     
  12. Robert.Boston

    Robert.Boston Model S VIN P01536

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    Speed limits are supposedly about safety, not fuel conservation anymore. Sure, the move from 70 mph to 55 mph started as a gasoline conservation measure, but it had dramatic impacts on highway fatalities. As @andrewket pointed out, increasing the range of legal speeds creates additional safety issues, so I don't see how the safety-focused bureaucrats who set speed limits would ever buy into this idea.
     
  13. dhrivnak

    dhrivnak Active Member

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    And I for another do not like the idea. While fast can be nice; it also eats significantly into fuel economy and safety. There are many ways to promote EV's but I do not think this is one of the better ones. Normally when I am on the Interstate I am driving for range and with virtually no high speed charging options, faster driving is really just a longer trip time wise.
     
  14. VolkerP

    VolkerP EU Model S P-37

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    So let's modify the OPs signage and keep the idea of highway safety and fuel conservation:

    SPEED LIMIT
    400Wh / mi
     
  15. brianman

    brianman Burrito Founder

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    In many parts of Washington this would make the road undriveable in the Model S above 15mph (and in some cases even that's questionable). So, no, let's not.

    Furthermore, this would only appeal to the environmental crowd not the average driver. As such, it would be a step backwards from my intent in the OP.
     
  16. Raffy.Roma

    Raffy.Roma Active Member

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    Agree 100%. IMO main thing is to address also to people that are not so much interested in environment. By setting a higher speed limit for EVs maybe that also a Ferrari owner would find it interesting to buy an EV.
     
  17. brianman

    brianman Burrito Founder

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    And motivate Ferrari to sell some high performance EVs.

    Ferrari owners would get tired of hearing "my Tesla is faster than your Ferrari on every freeway in America" after establishment of a higher EV speed limit federally.
     
  18. caddieo

    caddieo Member

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    I would agree. A few years ago, I read an article that listed factors contributing to accidents. One of them was speed differential - the gap between the fastest and slowest cars on the highway. Another way of putting it would be to say that slow drivers may not be involved in accidents, but they cause accidents.
     
  19. brianman

    brianman Burrito Founder

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    So we should ban cars that are going 30 under the speed limit because they present a hazard? Like hypermilers doing 40 in a 70mph zone?
     
  20. caddieo

    caddieo Member

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    I made an open-ended statement without recommendations. You can measure the gap going downwards with the fastest car as the baseline (as in the above example) or you can measure it going upwards using the slowest car as the baseline (e.g. - speed limits). It should be noted that some expressways already have minimum speed postings. Anyway, I leave the making of recommendations to those so inclined.
     

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