[Prague] City Ring

[Verso]

Why is the speed limit only 70 km/h? Couldn't it be at least 80?

[kokpit]

I'm not sure if it will be only on few parts, but generally it's due to safety since projected traffic intensity it's bigger than on motorways out of city and there will be also underground interchanges which are not very safe...
And I know that biggest traffic capacity of any road is reached somewhere near 60-70 kmph so 70 kmph speed limit doesn't decrease max traffic intensity of the road, it just slow down cars going there out of peak hours in thin traffic.

[kokpit]

Current photos of Lahovice tunnel (1660m), part of Prague outer bypass in the south of Prague. Should be completed in 10/2009.

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[kokpit]

Visualisations of north-west part of Prague City Ring (total length 6 400 m of which 5 500 m go in tunnels). Completion expected in 2011.

West End is at northern portal of Strahovský tunnel and Malovanka interchange, which is u/c from 2004. East end is in Troja on the right Vltava bank.
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Profiles
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[kokpit]

so here are the visualisations...

Malovanka interchange, currently u/c

Brusnice tunnel (Malovanka - Prašný most), 1400 m

Dejvice tunnel (Prašný most - Špejchar) with U Vorlíků interchange, 1005 m

Královská obora tunnel (Špejchar - Troja), 3090 m

Troja interchange
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New bridge in Troja for cars and trams (not part of City Ring)

[kokpit]

Few more visualisations of north-west part of City Ring

Malovanka interchange
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Prašný most interchange, including underground car park with 463 parking places

Converge with Hradčanská metro station, line A

U vorlíků interchange (near Sparta stadium), indcluding underground car park with 863 parking places

U Vorlíků interchange and air-conditioning complex of Královská obora tunnel (green)

Brusnice tunnel and Prašný most interchange

Dejvice tunnel

Královská obora tunnel near U Vorlíků interchange

Královská obora tunnel

[.oreo.]

Úžasný projekt a skvelé vizualizácie! Inak tá komunikácia pri štadióne Sparty označená ako "nadzemný objekt" sa bude len rozširovať?
Trójsky most je veľmi efektívne ale aj efektné riešenie. Je v tej oblasti nejaký väčší problém s dopravou?

[kokpit]

^ silnice u stadionu Sparty se asi jen opraví (momentálně jsou tam kostky) a postaví se ty dva vjezdy do tunelu na křižovatce U Vorlíků. Jinak účelem těch tunelů je právě odvést dopravu z Letné a Holešovic, takže by tu ulici (podle mě) měli spíš zúžit.
Co se týká Trojského mostu, nahradí současný provizorní tramvajový most z 80. let, který je asi 200m dál po proudu. Problém s automobilovou dopravou tam ani není, je to spíš do budoucna. Všichni hlavně doufají, že se tranzitní doprava přesune v maximální míře do tunelů a povrchové trasy budou sloužit jen lokální dopravě.

[kokpit]

Great photos of 6km long south-western part of outer bypass u/c. However, some of them were taken few month ago...

Lahovice tunnel (1660m) - Lochkov portal
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Radotín portal - 2km long flyover bridge will start here

inside the tunnel
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[Verso]

I know this outer ring isn't built yet (doh), but there's already quite some motorways/expressways around Prague. Is it difficult for the transit traffic to come through Prague (passing it by)? For example Brno - Dresden, Plzeň - Wrocław etc.

[kokpit]

Originally Posted by Verso

I know this outer ring isn't built yet (doh), but there's already quite some motorways/expressways around Prague. Is it difficult for the transit traffic to come through Prague (passing it by)? For example Brno - Dresden, Plzeň - Wrocław etc.

Yes, it's quite difficult, mainly for lorries which are not allowed to enter inner city area. You have to use City Ring (inner ring) which is extremely overloaded and radial roads.

so, follow the red thick line
Brno(D1)-Dresden(D8)

Plzeň(D5)-Wrocław(D11)

[Verso]

^ Wow, very nice, thanks! I thought it would be sth like that, but since these are (all) 4-lane roads (sorta expressways?), I didn't think they would be so congested, I thought the Prague's motorways/expressways were pretty easy to bypass the city.

[Verso]

Will the existing 4-lane parts of the (future) R1 all be widened into 6 lanes, so the entire R1 would be a 6-lane expressway?

[kokpit]

^ The existing 4-lanes IMHO no in the nearest future, because after completion of entire system (including inner city ring) they will be sufficient enough. However more loaded parts of R1 motorway will be built as 6-lanes. For example the part of R1 from D5 crossing to R7 crossing was built with 6 lanes already.

My photos of R1 I took near Ruzyne airport (close to R7-R1 crossing) at 2007-4-17
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[Verso]

^ Yeah, that seems more logical, firstly to build the entire ring, and then the widening, if necessary. Anyway, thanks!

[Ataman]

Widening can get difficult inside tunnels, however.

-Ataman

[kokpit]

Originally Posted by Ataman

Widening can get difficult inside tunnels, however.

-Ataman

Yeah, thats the good point, there were discussions about it here if not to build wider tunnels right away. The result is that ascendent tunnel tube will have three lanes and descendent two.

[kokpit]

So since now, I will post here just info and photos related to City (Inner) Ring, for Outer Ring (R1 Motorway) I've found this thread http://www.skyscrapercity.com/showthread.php?t=484668

[kokpit]

Last week photos, foundation pit for portals in Troja of the first of three projected tunnels in the northern part of City Ring - tunnel Blanka (3090m) going under the Vltava river
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[kokpit]

flash video of projected northern part of City Ring (three connected tunnels in total length 5.5km)
http://www.ceskedalnice.cz/video/cd-...izual-2007.htm