h a l f b a k e r y
RIFHMAO
(Rolling in flour, halfbaking my ass off)
idea:
add, search, annotate, link, view, overview, recent, by name, best, random
meta:
news, help, about, links, report a problem
account:
Browse anonymously,
or get an account
and write.
Login
Create account.
|
|
|
Speed cameras will never get you for going under the speed limit because there are often-times traffic jams and traffic tends to go nil. However, there are times when traffic just naturally wants to exceed the speed limit anyway. To this I say, "let it!"
I envision speed cameras that automatically
recallibrate the camera tripping velocity on a moving average basis. The camera would take the average speed of the last 3 cars on the road, and then if that average happens to be greater than the posted speed limit, that speed automatically becomes the new posted speed limit. However, if that average is less than the posted limit, then the camera just uses the posted limit. If a car happens to be traveling more than 15% over the average speed of the three cars in front of it, then the camera flashes that car and resets itself back to the previous speed limit iteration.
The idea is that you should be traveling within at least 15% of the average speed of the flow of the three cars in traffic ahead of you in order to stay safe.
Dynamic Speed Limit
Dynamic_20Speed_20Limits
To Complement This Idea of Course [quantum_flux, Mar 14 2008]
[link]
|
| |
I don't see how this makes more money for the speed camera companies or the government, so I don't see how it could work. |
|
| |
You may give them an idea with this, however, giving tickets to slow drivers in traffic. Brilliant! |
|
| |
They make money off the guy who drives faster than the rest of traffic no matter what the flow of traffic is.... it's usually that guy who gets into accidents and causes rush hour traffic jams. Of course, they still give the rest of the law abidding citizens the freedom to go as fast as the flow is going without having to slow down when they get to the cameras. |
|
| |
Three cars travelling down the road, all at the same high speed: the first gets a ticket, the others don't. |
|
| |
It's the people who are exceeding 15% of the average speed of the 3 cars in front of them that get flashed. It's highly unlikely for 3 cars in a row to be going that much faster than the rest of the traffic ahead of them as that's about 7 car lengths for car #2 to slow down and about 14 car lengths for #3 to slow down to a reasonable speed before getting flashed. |
|
| |
There are plenty of opportunities for 3 cars to be not directly following any others: for example, the first three away from a set of lights. If car 1 exceeds the previous 3 average (long since gone, or even a few hundred metres in front), he gets flashed, and at the same time raises the average for the previous three as applied to car 2, who may find himself completely unflashed. |
|
| |
What about cars going slower? I'm always terrifed for those guys who pootle along the motorway at 60 when everyone else is doing 80. |
|
| |
When I saw "Relative Velocity Speed Cameras" I thought this would be a speed camera that took into account relativistic time-dilation effects experienced by vehicles travelling at speed (as predicted by Einstein) which cause the speed of a vehicle as measured by a stationary speed camera to differ from that measured by the vehicle itself. |
|
| |
I'd like to see you arguing that with the law. |
|
| |
Simpler to use the German method, where more than half the autobahn doesn't have limits. (And some stretches have variable limits.) |
|
| |
[Ling], I said ... //If a car happens to be traveling more than 15% over the average speed of the three cars in front of it, then the camera flashes that car and resets itself back to the previous speed limit iteration.// ... meaning that the speeding car's velocity isn't counted if it gets flashed. |
|
| |
Also, proper ediquitte would say to do the posted speed limit when in doubt. |
|
| |
It'd never fly in the States. It requires that drivers use their own best judgment. |
|
| |
Also, I used to commute to work at 3am, and there would be times when I was the only car for miles - and on the ridges, I can see for miles, so I know I speak literally. What does the camera do then, when there is no greater body to compare against? It'd really stink if I had to adhere strictly to the limit because that was the default. |
|
| |
If, on the other hand, an absence of traffic meant no limit, my old hoopy would probably wind up throwing a rod... |
|
| |
I suppose there are many ways to customize the traffic and traffic camera rules. It does seem reasonable to have some sort of time delayed reset value on the cameras, or perhaps the cameras could shut off during certain hours of the day or night when there is insufficient frequency of traffic to keep a reasonable speed limit. |
|
| |
Perhaps there could be an additional rule like .... If (V/X) < f; then turn "don't flash" ....
where V is the velocity; |
|
| |
X is the theoretical number of car lengths between the last two vehicles as determined by {"the time delay between speed recordings" times "the velocity difference between the last recorded velocity and your velocity" plus "the assumed prudent distance between the two vehicles (as determined by the average of your velocity and the previous velocity)"} divided by the standard car length for the vehicles on the road; |
|
| |
f is the predetermined prudent recording frequency which is dependent on the tabulated interpolations of the recorded velocity, V, and the calculated theoretical number of car lengths, X. |
|
| |
This basically determines the theoretical distance between you and the car in front of you at the time that you get your velocity recorded, and then determines if that car is long gone or not and whether to follow that 15% flashing rule or to over-ride that rule and not flash you. Long gone, I suppose, would be any distance where you don't see the last car in front of you due to upcoming off ramps and curves in the road. |
|
| |