A non-GPS Safety Tip for Teens and Older Drivers
I’m talking about speed control or cruise control here. I love a good cruise control. It really cuts down on driver fatigue and can do a much better job holding the car’s speed constant than I can. A constant speed certainly contributes to road safety and fuel economy and means that I won’t be one of those triply annoying drivers who passes you and then unconsciously slows down .. God, don’t ya hate that behavior?
But in my own GPS tracking and safety enhancement work I learned some facts which I find are not commonly known. Cruise control can create a dangerous situation for you if you don’t pay attention.
On slippery roads, icy or rain covered, please help ensure a Merry Christmas to all of us by turning you speed control off. Speed control technology is actually quite safe under normal circumstances, but on slippery pavement it can pose at least three major areas of concern.
First, it disconnects you from the feel of the road. When the road is slippery you receive important clues to your car’s coefficient of friction with the road through your right foot. When you feed in just a little more throttle and you don’t get the increase in speed you’re expecting you _know_ things are getting risky and it’s time to slow down.
The second problem is directly relates to number one. The speed control mechanism is relatively brainless. It senses the speed of the car and compares it to the speed you set. If the vehicle speed is lower the cruise control opens the throttle (steps on the gas) to increase speed. Still too low … well, easy, step on the gas harder. If the wheels begin to slip this can lead to a situation when the tires are spinning at an insane speed. If you suddenly hit dry pavement .. or worse, if one wheel hist dry pavement, you may find your car trying to commit an auto acrobatics act worthy of a movie stunt driver. even if you’re ready for it .. and we certainly aren’t always spring-loaded to make sudden steering corrections, you may not be able to regain control in time. You can observe this easily if you are on a wide, safe, slippery road sometime .. and especially if your car has a tachometer. gingerly engage the cruise and watch and see if the engine rpm doesn’t increase while the car speed remains constant or even slows down .. that’s your tires spinning. Warning .. better to trust me on this rather than actually do it.
Lastly cruise control can really contribute to hydroplaning accidents, like the one mentioned in the web site. This is a combination of problems one and two. the driver can’t ‘feel’ the incipient loss of traction and the cruise control will call for more and more engine power as the vehicle speed slows. this can be really critical if you’re under speed control on a normal wet road and your car suddenly hits standing water. You know how the sound and the sudden deceleration makes your heart skip a beat? Well just as the car becomes unstable and the tires have the maximum capability to hydroplane, the ‘dumb’ speed control sensor is feeding in more power … exactly what you don’t want.
So there’s Dave’s tip for the day, use you speed control but use it wisely. Mita suggested this to me, she’s always looking out for me and for other hurry-up drivers out there.
