Posted on 03/02/2006 7:29:00 PM PST by Turbopilot
Been trying to tell my representatives (?) this for years and get the same ol' shiess about saving gas. Notice at 75 you get better gas in a new car than 60 at the old standard?
I should have been clearer: available stopping distance will be proportional to speed minus a constant; required stopping distance is proportional to velocity squared plus a constant times velocity. So assuming vehicles enter every R seconds and are L feet long, and required stopping distance is proportional to half A times velocity squared plus T times velocity, the "excess" stopping distance will be:
RV-L - 1/2 AV^2 - TVThis establishes maximum and minimum speeds that would allow any vehicle to stop safely even if the vehicle before it were to stop instantly. In practice, vehicles generally don't stop instantly and thus it's usually possible to get away with shorter stopping distances.or
-1/2 AV^2 + (R-T)V - L
I should mention, btw, the importance of leaving extra stopping distance behind vehicles that can or might stop suddenly. If one is following a passenger car ahead of which is visibly-clear road, that car isn't going to come to an instant stop and one's own vehicle won't have to. On the other hand, if one is following a semi that's too tall for an overpass, the trailer might stop extremely suddenly--to the great detriment of anyone immediately behind it.
Then you don't understand the reflexive property, it's role in math or Aristotelian logic (which brings us to another point: Ayn Rand did not come up with this gem... it comes from Aristotelian dialectical reasoning: the base of reasoning by logic---or do you think that's for dopes, too?)
A=A for example may be used as a point of departure for any logical argument, such as that what we believe to be right derives from natural law. Without such a property, you cannot argue the validity of the Constitution or the Declaration of Independence. The concept that all men are created equal and endowed by their Creator with certain inalienable rights derives from Natural Law. If you don't accept Natural Law as the basis for a discussion on what it right and wrong, then you have no basis for discussing the legal basis of our society... and the whole thread unravels.
Ergo, the reflexive property is useful and interesting because without it we have no common basis for discussion, we can agree about nothing because we cannot agree upon a starting point, and logic and reason cease to exist. If you still believe that this property is "for dopes", I suggest reading a little more on the basis of Western Civilization and Aristotelian logic. If you *still* don't change your mind, then you must believe that logic, reason and Western Civilization are for dopes. :-)
Assume allowable braking decelleration of 0.5g (16 feet/second^2), and that "bumper to bumper" traffic would represent one vehicle every 16 feet. Reaction time is 1/2 second, and one vehicle enters a stretch of road every two seconds.
If all traffic is in one lane, the minimum and maximum safe speeds would be 16 and 32 feet/second (11 to 22mph). If the traffic is divided evenly among two lanes, the maximum and minimum safe speeds would be about 5 and 107 feet/second (3.5-73mph).
In the former case, at 32 feet/second, vehicles would be 48 feet bumper to bumper. A vehicle would travel 16 feet during the driver's reaction time, and would then take two seconds to stop. During that two seconds, it would travel an average of 16 feet/second. Total distance would be 48 feet.
In the latter case, at 107 feet/second, vehicles would be 412 feet bumper to bumper. The vehicle would travel 53.5 feet during the driver's reaction time, and then take 6.7 seconds to stop, going another 358.5 feet. Total distance would be about 412 feet.
Thus, in the presence of a 900 vehicle/hour traffic load, having everyone pull over to the right all the time would reduce the safe speed of the road from 73mph to 22mph.
The congestion is in the opposite direction's morning commute. He did a good job at getting drivers to tailgate and fume though.
ping
You must be a city boy. You just go drive across the desert at a mile a minute. I'm the guy doing 90.
To Hell with a constitution, huh? Hope you got your asbestos handy.
I am a big fan of the passing lane. It is not practical where there are left exits, ect. I am saying that if the road is filled with people driving 55, then people wanting to drive faster are causing problems and vice versa. I think the law should change. Also, the sleep deprived are not the people I would prefer to have speeding around.
CT does, on the local blotter it's called "failure to drive right." Being new to the Least coast, I once asked an orificer if that meant failure to drive right, or failure to drive correctly. He, not surprisingly, said, "yes."
Of course both of you are right in that there are traffic laws against impeding the flow of traffic. I happened to be taking a Freerepublibreak from studying a particularly challenging theory of electrodynamics when I read Star Traveler's following comment:
"If the flow of traffic is faster than you are driving, regardless of whether or not you are driving the speed limit, then you are impeding traffic."
So in a wry moment of inside joking where I was the only one privy to my (lack of) humor, I read the statement as a general physical law (it kind of has that form). The word 'regardless' made me think of someone driving 170 mph with another guy driving 190 zooming up on his bumper. The 170 mph guy might get a ticket, but I meant I doubted he was breaking any law of "impeding traffic", thereby violating Star Traveler's law of traffic. Yes, that is all extremely nerdy.
We lost the war once by being slow. Not gonna do it again. ;-)
But we lost that war, unfortunately. More to the point, I don't particularly care for the constitution as a defense of anything. I do believe in the right to bear arms, but only for the many good reasons that we should have such a right (and the right to speech, privacy, etc).
That some government document coincidentally agrees with God's gift of freewill shouldn't mean anything.
As long as we are tying this in with Ayn Rand for some reason, the same should be asked of her "A is A" obsession: Why is the obvious treated as genius? Why is the Constitution so worshiped, given its highly redundant declaration that "We may talk..." (Gee thanks, Maaaay I???)
Nonsense. It should have its sirens and lights on, which should compel all intervening vehicles to yield. When the EMT was behind the "pace cars" then they would be obliged to move to the right as well and no doubt would have. But if you need an excuse to be angry, I guess any one will do.
Nice try, moron. Back to the minors at DU for more seasoning.
Thus, in the presence of a 900 vehicle/hour traffic load, having everyone pull over to the right all the time would reduce the safe speed of the road from 73mph to 22mph.
Your given assumptions are flawed. You wouldn't need to slow down again after you passed a slower moving car. You would simply move over in front of him to fill the gap he caused by driving slowly. You would then continue on and outdistance him at a normal rate of speed.
Same goes for Houston. I evacuated their a few hurricanes ago. Even though I have family there, I hope I never, ever go back!
NOT breakin' the law, NOT breakin' the law [insert Judas Priest riff here]
I was stuck in a pack of people on I-75 behind a couple of FHP cars doing this. It just shows how absurd the !@#$@!%$@ speed limits are in the first place. The sad thing is that nobody seems to care. I hope this film is enough to jog the heads of some folks in the U.S. I doubt it.
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