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Managed Motorways catch thousands of speeders
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DennisN
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Joined: Feb 27, 2006
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PostPosted: Mon Jul 21, 2014 6:01 pm    Post subject: Reply with quote

pdfbt40 wrote:
M8TJT wrote:
DennisN wrote:
You can do the same thing using marbles in a bucket. But I've forgotten how.
What? Water hammer? I always thought the you needed water, a pipe and some sort of tap.


OK, I give up. Obviously education is not part of this forum. Sad

You must excuse M8TJT, he's old.
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GerryC
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PostPosted: Mon Jul 21, 2014 8:29 pm    Post subject: Reply with quote

In a vague attempt to return to the subject, when the variable limits were first put in on the M42 it did give the impression that it was based on current traffic. Everyone knew that if everyone stayed at 50, there would be a good chance that you would keep moving through the congested section.

Nowadays though, you get long sections that are set low for no obvious reason and hard shoulder running when there's hardly enough traffic for two lanes. It's no wonder drivers are ignoring the artificial limits as you don't sense any improvement in your journey.

At other times, the M6 then shows loads of 40 zones near the M5 when you can't drive above 20ish anyway regardless of the limit. It's almost as if the mentality has changed to "we have the signs so we're going to use them".

Gerry
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pdfbt40
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Joined: Jan 23, 2008
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PostPosted: Mon Jul 21, 2014 8:57 pm    Post subject: Reply with quote

There is a disconnect between being able to predict most of that behaviour, and actually having a solution built into the control system to help them.

When I asked the Highway Engineers building these systems, would they work, the answer was "It does in Germany".
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M8TJT
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PostPosted: Mon Jul 21, 2014 8:59 pm    Post subject: Reply with quote

Perhaps the German programmers are a lot better than ours.
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pdfbt40
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PostPosted: Mon Jul 21, 2014 9:16 pm    Post subject: Reply with quote

Well I have to say, from professional experience, its a difference in cultural attitude. Although there will always be exceptions. they are very regulation driven.

I saw a mobile speed camera on a tripod at the side of the road entering a village. No chains or cables. I asked my host if they were ever removed. He said only by the police to the other end of the village.
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Jaz666
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Location: Barnoldswick, UK

PostPosted: Tue Jul 22, 2014 12:57 pm    Post subject: Reply with quote

I believe the M62 managed section has random cameras on when the variable limit isn't set.

A few weeks back I was happy moving along at 70mph, overtaking in the outside lane, when a Audi/BMW started tailgating me.
The middle lane cleared, so I pulled in just before a gantry, Mr Impatient sped past me and the camera flashed him.

It certainly made my day Laughing
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ayh20
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PostPosted: Fri Jul 25, 2014 8:47 am    Post subject: Reply with quote

It makes me wonder if we now need a new category for cameras.

Allways active and active during speed restrictions....

Thoughts ?
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K13ehr
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Joined: Jul 12, 2008
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PostPosted: Fri Jul 25, 2014 10:03 am    Post subject: Reply with quote

I was on the M62 yesterday, (Jcn 26-27) signs set to 60, hard shoulder open, traffic flowing nicely.

As usual some idiot went flying through in lane 3 at about 90, it was like the paparazzi had turned up.
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jjmurphy
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PostPosted: Fri Jul 25, 2014 10:11 am    Post subject: Reply with quote

My experience of managed motorways, smart motorways, whatever you want to call them, is that the variable speed limit would work in smoothing out traffic flow if only everyone drove at that limit. Unfortunately, when, for example, 50 mph is posted, there are still vehicles travelling at 45, 40 or even 35mph, all of which negates the flow-smoothing effect of the variable limit. I see no benefit in the variable limits and, as for signs/limits being posted when there is no hazard...... don't get me started!!
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MITCHETJ
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PostPosted: Fri Jul 25, 2014 10:12 am    Post subject: Reply with quote

pdfbt40 wrote:

OK, I give up. Obviously education is not part of this forum. Sad


Please don't. It adds a certain balance to the forum :-)

Not to mention being a Good Thing.
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bmuskett
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PostPosted: Fri Jul 25, 2014 10:16 am    Post subject: Reply with quote

ayh20 wrote:
It makes me wonder if we now need a new category for cameras.

Allways active and active during speed restrictions....

Thoughts ?

No. Assume they're always active, either at the displayed speed or the NSL. There's no way of knowing, and having them active when there's no speed displayed seems to be the norm now.
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bmuskett
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PostPosted: Fri Jul 25, 2014 10:24 am    Post subject: Reply with quote

MITCHETJ wrote:
pdfbt40 wrote:

OK, I give up. Obviously education is not part of this forum. Sad


Please don't. It adds a certain balance to the forum :-)

Not to mention being a Good Thing.

Welcome to posting. You joined 4 days before I did but this is your first post. Quality not quantity.
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ayh20
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Joined: Sep 23, 2005
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PostPosted: Fri Jul 25, 2014 12:04 pm    Post subject: Reply with quote

bmuskett wrote:

No. Assume they're always active, either at the displayed speed or the NSL. There's no way of knowing, and having them active when there's no speed displayed seems to be the norm now.


I understand your point but knowing the way that traffic flows and people drive, 70mph along a motorway with inactive cameras can be a scary position to be in .... i'm much happy driving with the flow.

Maybe what we need is sensible, consistent limits which are logically and appropriately enforced ....
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K13ehr
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PostPosted: Fri Jul 25, 2014 12:47 pm    Post subject: Reply with quote

Or stop speeding altogether, it's not like the limits aren't well known.
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pdfbt40
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PostPosted: Fri Jul 25, 2014 1:50 pm    Post subject: Reply with quote

jjmurphy wrote:
My experience of managed motorways, smart motorways, whatever you want to call them, is that the variable speed limit would work in smoothing out traffic flow if only everyone drove at that limit. Unfortunately, when, for example, 50 mph is posted, there are still vehicles travelling at 45, 40 or even 35mph, all of which negates the flow-smoothing effect of the variable limit. I see no benefit in the variable limits and, as for signs/limits being posted when there is no hazard...... don't get me started!!


There are, though its in regulation, very few sections which have minimum speed limits. IIRC Dartford Tunnel, which isnt a motorway.

Of course, probably an urban myth, that a car rolled on the roundabout under M4 to Heathrow Spur. The (elderly) driver helped from the vehicle was muttering "Its impossible to drive at the posted speed".
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