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Old July 14th, 2010, 10:53 PM   #2841
ChrisZwolle
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Heat destroyed the pavement on Autobahn A29 between Oldenburg and Wilhelmshaven in Northern Germany.


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Old July 14th, 2010, 11:38 PM   #2842
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Damn, I've never seen that happen before. I wonder if that happens more with concrete than with asphalt. I know concrete absorbs less energy than asphalt, but asphalt is more flexible...
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Old July 15th, 2010, 07:38 AM   #2843
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Blowouts like that happen in hot weather. Still, those are big-ass ones.

Yes, they are pretty common summertime occurrences on concrete roads. I even see it happen with concrete sidewalks around here.

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Old July 15th, 2010, 08:48 AM   #2844
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Quote:
Originally Posted by mgk920 View Post
Blowouts like that happen in hot weather. Still, those are big-ass ones.

Yes, they are pretty common summertime occurrences on concrete roads. I even see it happen with concrete sidewalks around here.

Mike
That's very odd, I've never heard of that happening in the United States. If I'm not mistaken, one of the reasons the U.S. uses PCC is because there is less thermal expansion.

Germany uses bituminous concrete right?
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Old July 15th, 2010, 02:29 PM   #2845
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Quote:
Originally Posted by ChrisZwolle View Post
Heat destroyed the pavement on Autobahn A29 between Oldenburg and Wilhelmshaven in Northern Germany.


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Old July 15th, 2010, 10:03 PM   #2846
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That in Spain doesn't occur. And we have temperatures up to 45ºC...
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Old July 15th, 2010, 10:07 PM   #2847
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Spain does not use concrete on motorways as far as I know. (or at least not extensively).

On decent asphalt highways, the worst you can get is rutting. Concrete, however, cannot expand easily, and will crumble or break all together.

However, I have to add I was under the impression the concrete on A29 was very old the last time I drove there (2008).
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Old July 15th, 2010, 10:30 PM   #2848
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Temperatures that high occur only very seldom in Northern Germany close to the North Sea. We see more than 30° C only once in a while up there.
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Old July 16th, 2010, 12:38 AM   #2849
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And especially not without cooling down for weeks.
In extreme weather conditions like this, it might happen everywhere else, too.
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Old July 17th, 2010, 02:26 PM   #2850
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Here's a very nice website from Northrhine Westfalia which has all the current and even predicted trafficjams:
http://www.autobahn.nrw.de/
(In the lower left corner of the website you can switch to the english, french or dutch version of the website.)

It doesn't only have the actual traffic situation and current roadworks shown on the map, but also even the possibility to look at traffic forecasts several minutes or even up to several days in advance (+7 longtime prognosis).

A very fancy and sophisticated service for planning a trip by car.
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Old July 17th, 2010, 03:38 PM   #2851
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Quote:
Originally Posted by CNGL View Post
That in Spain doesn't occur. And we have temperatures up to 45ºC...
Quote:
Originally Posted by ChrisZwolle View Post
Spain does not use concrete on motorways as far as I know. (or at least not extensively).

On decent asphalt highways, the worst you can get is rutting. Concrete, however, cannot expand easily, and will crumble or break all together.

However, I have to add I was under the impression the concrete on A29 was very old the last time I drove there (2008).

The main difference is that in places that usually get very hot in summer (like Spain), the road surfaces are designed with that in mind.
In northern Germany they aren't designed accounting for a long period of high temperatures (because it's highly unusual), so there are those problems.

The reverse is also truth. In areas where very cold temperatures never happen, pavements aren't designed for extreme cold, so if there is an extremelly cold spell, probably the roads would crack.


Bottom line: roads are designed for a specific temperature range, and when the temperature differs significantly from that usual temperature range, there usually are problems.
I'm not very familiarized with concrete, but for asphalt the design temperaure is very important.
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Old July 17th, 2010, 10:16 PM   #2852
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From today 10pm to Monday 5am the whole A40 (Ruhrschnellweg) between Duisburg and Dortmund will be closed (60km)!

The reason is a project of the European Capital of Culture Essen/Ruhr Area: "Still-Leben Ruhrschnellweg" - For one day this important road belongs to pedestrians and cyclists.

Over 1.000.000 visitors are expected (including me )

There is now also a StreetView for the A40:
http://www.wdr.de/themen/kultur/360grad/a40/index.php
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Old July 18th, 2010, 06:00 PM   #2853
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...

Last edited by lambersart2005; July 18th, 2010 at 06:07 PM.
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Old July 18th, 2010, 06:02 PM   #2854
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...double post... sorry!
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Old July 18th, 2010, 06:05 PM   #2855
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...and finally, here we go! ;-)

The closed A40 near Dortmund...


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Bicycle "jams" at the entrances.... the entrances were closed for several times because of the insane crowds!


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Sitting on one side, riding on the other!


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Old July 19th, 2010, 03:07 AM   #2856
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What a waste of road capacity

Sorry, it can't help that I really don't like to see anything on highways other than cars and trucks
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Old July 22nd, 2010, 03:29 PM   #2857
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A few pictures of the A352:

Quote:
Bundesautobahn 352 (translates from German as Federal Motorway 352, short form Autobahn 352, abbreviated as BAB 352 or A 352) is an autobahn spur north of Hanover in northwestern Germany. It is an important bypass for traffic from the A 7 to the A 2, avoiding the Hannover-Ost interchange between the two autobahns. Hanover/Langenhagen International Airport is also situated near the A 352, which is why locals occasionally refer to it as the Flughafenautobahn ("airport autobahn").

(Wikipedia)
01) Leaving the A7.

image hosted on flickr


02) The A352 has a total length of 18 km (11 mi).

image hosted on flickr


03) Also, the A352 doesn't have a speedlimit.

image hosted on flickr


04) The Hannover-Langenhagen Airport is situated near this Autobahn.

image hosted on flickr


05)

image hosted on flickr


06) The powerplant Gemeinschaftskraftwerk Hannover, also known as Kraftwerk Stöcken is visible.

image hosted on flickr


07)

image hosted on flickr


08) Entering the 3-way interchange Hannover-West and the A2, which was quite busy so 120 is here the speed limit.

image hosted on flickr


09) Notice the crosses on the left. Does anyone know why they are there?

image hosted on flickr
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Old July 22nd, 2010, 04:16 PM   #2858
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Quote:
09) Notice the crosses on the left. Does anyone know why they are there?
It's some sort of programme to make people aware of the many accidents. The A2 also has numerous banners across overpasses in several languages.
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Old July 22nd, 2010, 05:22 PM   #2859
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These speed limit signes can change in a dinamycal way?
Quote:
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A few pictures of the A352:

08) Entering the 3-way interchange Hannover-West and the A2, which was quite busy so 120 is here the speed limit.

image hosted on flickr
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Old July 22nd, 2010, 06:17 PM   #2860
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Quote:
Originally Posted by ChrisZwolle View Post
Heat destroyed the pavement on Autobahn A29 between Oldenburg and Wilhelmshaven in Northern Germany.


I've heard that has happened in Minnesota, where the ground in spring is still cold from winter, but the weather is getting much warmer, so the difference in temperature ... makes things break.
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