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PostPosted: Thu Mar 03, 2011 22:20 
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Allvoices here
Brigid Jean Primrose - Allvoices wrote:
Life savers when driving in the rain.
Johannesburg : South Africa | Mar 03, 2011 By Brigid Jean Primrose

Driving in the rain . .This may save your life

How to achieve good vision while driving during a heavy downpour.
We are not sure why it is so effective; just try this method when it rains heavily. This method was told by a Police friend who had experienced and confirmed it.
It is useful...even driving at night.

Most of the motorists would turn on HIGH or FASTEST SPEED of the wipers during a heavy downpour, yet the visibility in front of the windshield is still bad.......

In the event you face such a situation, just try your SUN GLASSES (any model will do), and miraculous! All of a sudden, your visibility in front of your windshield is perfectly clear, as if there is no rain.
Make sure you always have a pair of SUN GLASSES in your car, as you are not only helping yourself to drive safely with good vision, but also might save a friend's life by giving him this

Idea..
Try it yourself and share it with your friends! Amazing, you still see the drops on the windshield, but not the sheet of rain falling.

You can see where the rain bounces off the road. It works to eliminate the "blindness" from passing semis spraying you, too. Or the "kickup" if you are following a truck or car in the rain. They ought to teach that little tip in driver's training... It really does work.
This warning is a good one! I wonder how many people know about this. I know I didn't.

Another Driving Tip:
A 36 year old female had an accident several weeks ago and totaled her car. A resident of Kilgore , Texas she was traveling between Gladewater & Kilgore. It was raining, though not excessively, when her car suddenly began to hydro-plane and literally flew through the air. She was not seriously injured but very stunned at the sudden occurrence!

When she explained to the highway patrolman what had happened he told her something that every driver should know - NEVER DRIVE IN THE RAIN WITH YOUR CRUISE CONTROL ON. She thought she was being cautious by setting the cruise control and maintaining a safe consistent speed in the rain..

But the highway patrolman told her that if the cruise control is on when your car begins to hydro-plane and your tires lose contact with the road, your car will accelerate to a higher rate of speed making you take off like an airplane. She told the patrolman that was exactly what had occurred.
The patrolman said this warning should be listed, on the driver's seat sun-visor - NEVER USETHE CRUISE CONTROL WHEN THE ROAD IS WET OR ICY, along with the airbag warning. We tell our teenagers to set the cruise control and drive a safe speed - but we don't tell them to use the cruise control only when the road is dry.
The only person the accident victim found, who knew this (besides the patrolman), was a man who had a similar accident, totaled his car and sustained severe injuries.

NOTE: Some vehicles (like the Toyota Sienna Limited XLE) will not allow you to set the cruise control when the windshield wipers are on. If you send this to 15 people and only one
Of them doesn't know about this, then it was all worth it.
You might have saved a life.
Interesting ? :scratchchin:

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PostPosted: Thu Mar 03, 2011 23:35 
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Yes, interesting. I think the "take off like an airplane" is a bit far-fetched though! I can't quite see it myself, but I could believe (JUST!) that some sort of instability could occur.

Cruise controls work by monitoring the car's speed against what you have asked for. If it finds the speed is too low, it will open the throttle a bit until the car gets back up to the desired speed. If it finds its going too fast, it will back off the throttle until it drops back down to the desired speed.

In most older cars, the speedometer signal comes from the driven wheels - and many American cars are rear wheel drive.

If the car's driven wheels start spinning (because you're aqua-planing), the car will think that it is going too fast and back off the throttle. That MIGHT (on some cars and in some conditions, lead to a bit of lift-off oversteer. Given that someone using cruise control probably won't be that focussed on the driving, it might well catch them by surprise - too late to stop it spinning.

As for the car accelerating...

..I can't see how it could manage that if it's tyres hard lost grip to the point of aqua-planing, nor could I see it even wanting to accelerate!


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PostPosted: Thu Mar 03, 2011 23:40 
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Ah! A quick "Google" revealed the following:

http://www.hoax-slayer.com/cruise-control-warning.html

and

http://www.museumofhoaxes.com/hoax/webl ... _the_rain/

among others!


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PostPosted: Fri Mar 04, 2011 00:05 
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Ahha ! Certainly a fast alteration to throttle can result in a problem, couple that with a pot hole or road surface change, bump etc and the variables are many and varied ! As they say, mechanical problems too will see further problems.

I kinda doubt the sunglasses concept too ... wipers do the job well.

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PostPosted: Fri Mar 04, 2011 00:17 
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I never use cruise control at all but I certainly wouldn't attempt to use it in icy or snowy conditions, in those conditions throttle control is critical and should be as sensitive and delicate as possible.

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My views do not represent Safespeed but those of a driver who has driven for 39 yrs, in all conditions, at all times of the day & night on every type of road and covered well over a million miles, so knows a bit about what makes for safety on the road,what is really dangerous and needs to be observed when driving and quite frankly, the speedo is way down on my list of things to observe to negotiate Britain's roads safely, but I don't expect some fool who sits behind a desk all day to appreciate that.


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PostPosted: Fri Mar 04, 2011 00:33 
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SafeSpeedv2 wrote:
I kinda doubt the sunglasses concept too ... wipers do the job well.

There is a tiny bit of merit to this, but I suspect any benefit would be quite small, even when considered in isolation.

Wearing a dark pair of glasses will result with the pupil being wider. Hence focussing at infinity will result with near objects being more out of focus. This additional blurriness reduces the visual impact; less detail means it is less likely to catch one's attention. Anyone who has experimented with aperture settings, while taking photos of distant subjects through a fence, will know what I mean.

If the light intensity is considerably low then drops could again appear less distinct. This effect parallels taking images of any moving subject, such as rain or waterfalls, with increased exposure times and compensating by use of neutral density filters.

I really wouldn't recommend driving during the night (raining or not) with sun glasses.

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PostPosted: Fri Mar 04, 2011 01:11 
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Yep indeed. There are the yellow tinted one's which can help night vision but not sure what effect they have on the 'rain on screen' issue. I guess night vision facilities would resolve any problems at all ! :)

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PostPosted: Fri Mar 04, 2011 20:33 
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I have found some sunglasses can help improve contrast in some rainy conditions, but they are by no a default choice.

AFAIK in a modern car the cruise control is normally disengaged by the traction control etc. if the wheel speeds are anomalous. A friend of mine reckons cruise is a good idea on a motorway in potentially icy conditions as the sensors will pick up any wheel slip and disengage the CC before you would notice the surface change yourself. Not totally convinced though.

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PostPosted: Fri Mar 04, 2011 22:28 
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It has to be rot, how else could a car reliably measure groundspeed at all times other than through the speed of the drivetrain? Spinning wheels would cause it to back off.

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