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Old November 12th, 2015, 09:31 PM   #4121
ChrisZwolle
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Road traffic development October 2014 - September 2015 by the DfT:
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Old November 15th, 2015, 09:37 PM   #4122
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Exiting M25 anticlockwise for South Mimms Services at Jct 23.
Good example of organization of British roundabout junctions:


And here coming back to M25
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Old November 16th, 2015, 04:25 PM   #4123
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M25 anticlockwise from around A1(M) to M3
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Old November 17th, 2015, 04:54 PM   #4124
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Drive through the Blackwall Tunnel from south to north. The tunnel itself starts about 3min 30s of the video.
It is a damn narrow tunnel.
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Old November 17th, 2015, 06:56 PM   #4125
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Quote:
Originally Posted by geogregor View Post
Drive through the Blackwall Tunnel from south to north. The tunnel itself starts about 3min 30s of the video.
It is a damn narrow tunnel.
Cool vid. Considering when the Tunnel was built, it's no surprise it's so narrow.
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Old November 19th, 2015, 01:33 AM   #4126
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Cool vid. Considering when the Tunnel was built, it's no surprise it's so narrow.
Thanks. Still, there are some older tunnels which are not so narrow and twisted

Today anticlockwise night drive along the southern bits of M25
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Old November 23rd, 2015, 05:54 PM   #4127
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Some videos of the motorways around Cheshire and Merseyside.

M53 and A59, featuring the Kingsway Tunnel:



The A41 out of Liverpool through the Queensway Tunnel:



And the M56 plus the Silver Jubilee Bridge, featuring some of the roadworks of the access roads to the new Mersey Crossing:



At first it seemed impressive to me that Liverpool had an underwater tunnel in the 1930s -then I read about the Blackwall Tunnel
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Old November 23rd, 2015, 07:26 PM   #4128
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Queensway is the largest road tunnel in the UK. The bore is massive even if you don't realise that the road is only in the top half (and no other bored tunnel has more than 2 lanes in it). It is very impressive.

I do not believe that the Mersey Tunnels have road numbers (they are private roads). The OS added the numbers at the same time that they went from yellow to green (after primary routes were added) - it's either a trap street (deliberate mistake designed to catch copycats), or an issue with the data processing that primary routes need numbers or something.
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Old December 4th, 2015, 01:52 PM   #4129
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Forth Road Bridge

Problems in Scotland...
Forth Road Bridge closed until New Year

The Forth Road Bridge (FRB) is to shut until the New Year for repairs following the discovery of defective steelwork.

Following a meeting of the Scottish Government Resilience Committee (SGoRR), chaired by the First Minister, the decision to close has been taken after inspections carried out by specialist engineers and following advice and assessment of the fault by independent experts.

Work is already under way to repair the FRB and this will be done as quickly as possible with a view that it will be reopened to traffic to allow it to be used for the return to work in January.
Full press release: http://www.transportscotland.gov.uk/...until-new-year

The bridge is currently being replaced by the new Queensferry Crossing, but that bridge won't open until 2016.
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Old December 4th, 2015, 04:55 PM   #4130
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Problems in Scotland...
[INDENT]Forth Road Bridge closed until New Year

The bridge is currently being replaced by the new Queensferry Crossing, but that bridge won't open until 2016.
I guess it was planned to repair the bridge after the new one is finished, to further use it for local traffic, whilst the new one will be a motorway?

This way the load would have been less and it would enlengthen the overall lifespan.

In streetview it seemed to be a speed limit of 50Mph (80Kmh). This could be reduced to 35Mph (54Kmh). This would reduce deterioration.

To prohibit heavy vehicles in comparison seems not so intelligent. If they are not only heavy but slow, using the motorway would be a problem. And the detour is big if both bridges are unuseable thisway.

The bridge is 51 years old now. It was the longest bridge of this type that time. I am interested about the problems occuring. Is it just wear and tear? Is there something what is built in a better way nowadays? I would guess it to last longer with good maintenance.
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Old December 4th, 2015, 05:10 PM   #4131
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The Forth Road Bridge is a suspension bridge. Usually suspension bridges last pretty long, it's unusual for a 50-year old bridge to develop such structural problems.

The new Queensferry Crossing will carry all traffic, it is planned that the old bridge remains as a 'dedicated public transport corridor' which seems like a waste of money considering how much future maintenance and upkeep of the old bridge will cost, just for buses. It would've made more sense to construct the Queensferry Crossing as a six-lane bridge, but the Scottish government decided it did not want to facilitate traffic growth.
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Old December 4th, 2015, 11:17 PM   #4132
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You know i don't want to swagger, so i never told, that i studied in material sciences... So i have some knowledge in background. But that does not mean i can understand everything, its jsut helpful to dela with information given. If there is any. Yet i did not know how severe the problems are but i thougt about long lasting bridges...

A simple piece of concrete can sustain 80 years (which some polish motorway overpasses do the führer built *g*). But after a while the material is washed out, the reinforcement steel rusts through... Steel like the Eiffel tower could sustain several centuries i guess, if always covered in a thick layer of paint. But there is only wind at the tower... Vibrations are the biggest problem in my view. Some old steel or even iron bridges suffer, because nobody had an idea of heavy trucks, when they were built, at least not in such number.

Nevertheless, compared to anything made of concrete, you could exchange several steel parts if necessary.
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Old December 5th, 2015, 12:46 AM   #4133
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There is an 85 year old suspension bridge, the Ambassador bridge, between Detroit and Canada and that carries a lot more traffic than could be imagined 85 years ago. I thought one of the expansion joints on the northbound Forth was way out of alignment when I drove over it earlier this year and thought to myself this bridge sure needs a bit of maintenance.
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Old December 5th, 2015, 11:37 PM   #4134
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There is an 85 year old suspension bridge, the Ambassador bridge, between Detroit and Canada and that carries a lot more traffic than could be imagined 85 years ago. I thought one of the expansion joints on the northbound Forth was way out of alignment when I drove over it earlier this year and thought to myself this bridge sure needs a bit of maintenance.
Well america and maintenance are two words hard to use in one sentence. Bridges (etc.) in such bad state won't be open in europe anymore. Its well known and often discussed, that USA has one of the worst infrastructure of all western countries...
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Old December 6th, 2015, 02:16 AM   #4135
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Well america and maintenance are two words hard to use in one sentence. Bridges (etc.) in such bad state won't be open in europe anymore. Its well known and often discussed, that USA has one of the worst infrastructure of all western countries...
Nonsense. Just take a look around the US threads and you'll see that some European countries (Germany or Belgium to name the most blatant cases) have infrastructure in worse condition.
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Old December 6th, 2015, 02:28 PM   #4136
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Nonsense. Just take a look around the US threads and you'll see that some European countries (Germany or Belgium to name the most blatant cases) have infrastructure in worse condition.
Maybe not worse, but many countries which had big road building spree about 40-50 years ago (mostly parts of Western Europe and North America) are now facing issues of renovating and replacing many of the structures build back then.

China will eventually face the same issues and I would say sooner than some might expect.
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Old December 6th, 2015, 02:33 PM   #4137
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Arguably the chinese network in the eastern third already has better redundancy than the US or UK . It is quite a dense grid now that can survive a segment loss.

HOW would the UK cope with an M62 maintenance shutdown for example.?

Speaking of which I had a laugh at this one.


http://www.independent.co.uk/news/uk...-a6754841.html
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Old December 6th, 2015, 02:39 PM   #4138
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Arguably the chinese network in the eastern third already has better redundancy than the US or UK . It is quite a dense grid now that can survive a segment loss.

HOW would the UK cope with an M62 maintenance shutdown for example.?
I was thinking more about quality of work. There was/is a lot of corner cutting on the Chinese construction sites. I think lots of structures will have serious issues after 20 rather than 40 years.
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Old December 6th, 2015, 02:48 PM   #4139
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Arguably the chinese network in the eastern third already has better redundancy than the US or UK . It is quite a dense grid now that can survive a segment loss.
Yes, China recently widened some expressways from four to eight lanes. They simply closed a long stretch of expressway to all traffic, demolished the old expressway and built a new eight-lane one on the old alignment. During construction, traffic was diverted to alternate expressways.

But Chinese expressways are really built for long-distance traffic. Most expressways have a considerable distance between junctions, even if the rural areas are densely populated. European motorways are used a lot for trips in the 15 - 20 mile range. Long-term closures of major routes are not feasible here, due to traffic volumes being near capacity on many major motorways.
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Old December 25th, 2015, 06:16 PM   #4140
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A9, Cromarty Firth northbound approach and crossing. Photographed in 2015.


1.




2.




3.




4. on the bridge




5. After the bridge. The firth will be on the right for a while.

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