Hussain wrote:
well the problem with that is, who is the 50 MPH speed limit designed for? It's designed for ANY vehicle to be able to drive safe at that speed. Its common sense that a Ferrari or GT-R could stop faster and avoid an accident better then a 18 wheeler semi truck. But 50 MPH is the speed limit at which ALL vehicles can drive safely. That being said, maybe 90 MPH is safe in a car like ours. semi trucks carry tons and tons of stuff. for them to be able to stop while going 50 MPH and having to stop all those tons and tons of pounds their towing will require a much greater braking distance, BUT it is still "safe" requiring that braking distances. Of course a altima coupe going 50 MPH will stop faster then a altima coupe going 90 MPH BUT the more important question is, will it take a altima coupe a longer distance to stop at 90 MPH then a big rig semi would going 50 MPH? the question is relevant because IF the altima coupe CAN stop shorter at 90 then the big rig at 50, it means that the altima coupe going 90 is SAFE enough and is not driving recklessly..... it's still illegal to go over the speed limit and you'll still be in a lot of trouble if you got caught doing that but this is just a theory I have.
Most average cars take anywhere from 120-140 ft to stop from 70 mph. Now add another 20 mph and exponentially more kinetic energy, and you have a much larger stopping distance. I'm sure a semi takes longer to stop than a car, but I imagine they're built with proper spec braking system so they don't stop like a train. Sure, a semi stopping quickly can jack knife and take a few cars out, but again, if he is driving SAFELY and following a good 3-4 seconds behind the car in front, he will have more time to stop and react.
Stopping a shorter distance alone does not dictate safety (and I understand that's not your only reasoning for being safe). Going 90 mph in average traffic on the fast lane in a Lambo does not make it any safer than a Suzuki FX or Altima Coupe. It may stop a few feet shorter, but it all hinges on the DRIVER'S reaction time, and going 90 mph means you're covering over a 132 ft per second while you are thinking/reacting, vs 88 ft if you are going 60 mph. So even if the Lambo going 90 mph stops in 150 ft (a total conservative guess and it probably takes longer to stop) and an Altima going 60 mph takes 140 ft (worse case), it may take the DRIVER a second to react to the situation ahead, slam the brake pedal etc.. In that total time from reacting 1 sec. and then stopping 90 mph to 0 mph, the Lambo driver in my example takes 132 + 150 = 282 ft to stop? The Altima coupe in the next lane over sees the same problem, takes a second to react/slam the brakes and finally stops 60 mph to 0 mph, in about 88 + 140 ft, or 228 ft from reaction to stopping. That's 54 ft that the Lambo took extra to stop, meaning the Lambo probably hit something, or came very close to danger, while the Altima having been slower at 60 mph was a whole truck length behind, had more control over the car and situation to react/swerve and less potential to do lethal damage.
In any case, my argument or point of view in the previous post was about people driving recklessly, following too close, zig zagging with next to zero warning (turn signal on the INSTANT you change from lane to lane is not helping really...) and fitting in between cars to change lanes inches apart from front and back is not safe even at 30 mph. The guy in front could slow down suddenly, your car trying to fit through from behind and change lanes would hit his rear bumper, along with the other guy behind you in the next lane you were trying to change to. You'd be sandwiched between the two and cause way more damage.
I think when people want to go fast, as with anything, they will justify it in their heads with their reasoning. It really doesn't matter what the facts say, because in their minds they are always the better driver than the moron in the next car over, or have better brakes, or better tires, or better reaction time, etc. Or they simply admit to taking risks, and live with the consequences in any case. Myself, I admit to driving fast, but usually don't stray above 10-15 mph of the speed limit, and try to stay around 70-75 mph at worse on the highways (60-70 MPH zones), simply because I don't find its worth risking life and reducing MPG.
But back on topic, my first car I drove was a '92 Olds Cutlass. A used 4 banger my folks bought in '98 for $4k for my mom, in decent shape, turned POS by my family over the years that was good for me to learn on back in late '99, but not so good reliability wise. My second car was my own '00 Dodge Neon which I paid for with my money 90%. My second was a '05 Altima 2.5s lease which was my first true "nice car" and then an '06 Sentra 1.8SE as the only one I could afford, and now finally my Coupe which should have been another econobox if I was wiser.
