Author Topic: Would speed limits per second make drivers more aware of their speed?  (Read 4569 times)

hellymedic

  • Just do it!
Re: Would speed limits per second make drivers more aware of their speed?
« Reply #25 on: 08 October, 2010, 03:37:47 pm »
Given a speed v in m/s the stopping distance (in m) is:-

d = 0.6818v + 0.07626v2

Handy if you can convert mph to m/s in your head and do that kind of mental arithmetic. :)

 ;D ;D ;D

Rather easier in feet and mph innit?

Cudzoziemiec

  • Ride adventurously and stop for a brew.
Re: Would speed limits per second make drivers more aware of their speed?
« Reply #26 on: 08 October, 2010, 03:54:03 pm »
Skid-pan experience, even test, yes. Cones in a car park, no. That's what happens in Poland, and it's totally unrealistic - tests only low-speed clutch control and steering, really. Great for parking, but not much else.

I was thinking more race track than car park...
There only is one race track in the whole of Poland.  :)
Riding a concrete path through the nebulous and chaotic future.

Re: Would speed limits per second make drivers more aware of their speed?
« Reply #27 on: 09 October, 2010, 09:02:26 am »
What would be more useful would be for people to understand how kinetic energy (and hence damage potential and stopping distance) rise as the square of the speed.

The Powers That Be never (want to) get that message across.

Even more importantly, that most of the speed is lost in the last bit of the stopping distance: Coming to a halt from 30mph takes roughly the same amount of road as slowing from 40 to 30mph...
Life is too important to be taken seriously.

Jaded

  • The Codfather
  • Formerly known as Jaded
Re: Would speed limits per second make drivers more aware of their speed?
« Reply #28 on: 09 October, 2010, 06:07:00 pm »
Didn't a country introduce speed pan training and see the crash rate go up?
It is simpler than it looks.

gordon taylor

Re: Would speed limits per second make drivers more aware of their speed?
« Reply #29 on: 09 October, 2010, 08:01:50 pm »
Didn't a country introduce speed pan training and see the crash rate go up?

I have a memory that the story was about a Scandinavian company which introduced skid-pan and winter driving skills training for its drivers. The crash rate didn't change one bit, but the crashes were much more serious because of the higher speeds involved.

I'll try to find the reference, it might be in a book upstairs.


Cudzoziemiec

  • Ride adventurously and stop for a brew.
Re: Would speed limits per second make drivers more aware of their speed?
« Reply #30 on: 09 October, 2010, 08:36:50 pm »
So the drivers felt more confident in slippery conditions, relied on their new skills whereas before they would have slowed down and 'chickened out' of rapid turns, braking, etc, and lost control at high speed? That would be a classic case of risk compensation, wouldn't it.
Riding a concrete path through the nebulous and chaotic future.

Charlotte

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Re: Would speed limits per second make drivers more aware of their speed?
« Reply #31 on: 09 October, 2010, 09:54:28 pm »
That would be a classic case of risk compensation, wouldn't it.

Quite possibly, Cudzky-wudski  :D
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Cudzoziemiec

  • Ride adventurously and stop for a brew.
Re: Would speed limits per second make drivers more aware of their speed?
« Reply #32 on: 09 October, 2010, 10:38:46 pm »
Ha, wudski or wódki, pani Szarlota!  ::-)  :-\  :D
Riding a concrete path through the nebulous and chaotic future.