Quizzes & Puzzles9 mins ago
Average Sped Cameras
Have you ever been caught by one of these cameras ?
I've just come through a section of the M11/M25 with signs warning of 'Average Speed Cameras' and been passed by many vehicles cruising at well over the designated 50 limit. Just wondered if the cameras were fact or fiction.
I've just come through a section of the M11/M25 with signs warning of 'Average Speed Cameras' and been passed by many vehicles cruising at well over the designated 50 limit. Just wondered if the cameras were fact or fiction.
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For more on marking an answer as the "Best Answer", please visit our FAQ.According to a news report by the BBC it is relatively easy to avoid these average speed camera tickets by simply changing lanes. These cameras are fixed on one lane each
Wouldn't like to try it myself with all lanes travelling at the same speed as you get caught between 2 cameras not the one at the end and beginning, apparently
And yes, I know people who have been caught
Wouldn't like to try it myself with all lanes travelling at the same speed as you get caught between 2 cameras not the one at the end and beginning, apparently
And yes, I know people who have been caught
Remember, they are AVERAGE speed cameras. So, if you do 70 mph for the first half of the roadworks and 30 mph for the rest of it, you'd average 50 mph. This is an extreme example, of course, and they sometimes break long sections of work into several stages. You do need to be alert.
I think I read somewhere that they've sorted out the software glitch that stopped them dealing with changing lane.
And yes, I do know of people who've been done in them.
I think I read somewhere that they've sorted out the software glitch that stopped them dealing with changing lane.
And yes, I do know of people who've been done in them.
The lane changing problem was cured years ago. Old cameras worked in pairs along the road the entry camera being connected by cable to the exit cable. Modern cameras send number plate details to a central computer, lane independent, and order independent. So the speed could be measured from set 1-3 and set 2-4 in a long stretch.
You can prove anything with statistics, so here goes:
1.1% of Britain’s roads are motorways (2,705 of an approximate total of 247,000).
In 2008 there were 2,538 deaths on the roads of which 158 (6.2%) occurred on motorways. That is one deaths for every 17 miles of motorway and one death for every 102 miles of other roads.
So, mile for mile motorways are six times as dangerous as other roads. Put another way, assuming all the deaths result from excess speed (very rash assumption) a camera covering 100 miles of motorway will prevent six deaths whilst one covering 100 miles of other roads will prevent only one.
1.1% of Britain’s roads are motorways (2,705 of an approximate total of 247,000).
In 2008 there were 2,538 deaths on the roads of which 158 (6.2%) occurred on motorways. That is one deaths for every 17 miles of motorway and one death for every 102 miles of other roads.
So, mile for mile motorways are six times as dangerous as other roads. Put another way, assuming all the deaths result from excess speed (very rash assumption) a camera covering 100 miles of motorway will prevent six deaths whilst one covering 100 miles of other roads will prevent only one.
I read that about changing lanes, so always do. I am afraid to say I dont stick strictly to the 50 in them (if it is safe to do so) and have never got done. I am lucky though as I have never been caught by any camera, and the only time I was pulled over for speeding it was a BMW that miraculously turned itself into a police car.
"So, mile for mile motorways are six times as dangerous as other roads. Put another way, assuming all the deaths result from excess speed (very rash assumption) a camera covering 100 miles of motorway will prevent six deaths whilst one covering 100 miles of other roads will prevent only one."
I would agree that would be a very rash assumption New Judge. It is impossible to say that a camera would prevent 6 deaths per year. Why could a fatal accident that happened at 80mph also not happen at 70 or even 60.
I would agree that would be a very rash assumption New Judge. It is impossible to say that a camera would prevent 6 deaths per year. Why could a fatal accident that happened at 80mph also not happen at 70 or even 60.
The daft thing about average speed cameras on motorways is that a lot of them have service stations between the camera points.
Say the stretch of motorway between cameras is 10 miles ...
And the speed limit is reduced to 50 mph.
At an average speed of 50 mph, you will take 12 mins between the cameras.
If you stop at the service station for 6 minutes, and get a coffee, or petrol ...
... then you can drive the 10 miles at 100 mph, and you'll also take 12 mins.
Say the stretch of motorway between cameras is 10 miles ...
And the speed limit is reduced to 50 mph.
At an average speed of 50 mph, you will take 12 mins between the cameras.
If you stop at the service station for 6 minutes, and get a coffee, or petrol ...
... then you can drive the 10 miles at 100 mph, and you'll also take 12 mins.
"So, if you do 70 mph for the first half of the roadworks and 30 mph for the rest of it, you'd average 50 mph."
Not so-supposethe roadworks were 42 miles long.
21 miles at 70 mph takes .3 hours =18 mins
21 miles at 30 mph takes .7 hours =42 mins
Total distance 42 miles, total time 60 mins average speed 42 mph
Not so-supposethe roadworks were 42 miles long.
21 miles at 70 mph takes .3 hours =18 mins
21 miles at 30 mph takes .7 hours =42 mins
Total distance 42 miles, total time 60 mins average speed 42 mph
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