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Old August 3rd, 2007, 08:53 PM   #61
coth
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there were many 1+1+1 roads (1 shared lane) in soviet union. most of them currently rebuilding into 2+2.
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Old August 3rd, 2007, 08:59 PM   #62
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this is all outside the city... i've seen in Belgrade in town centre street with three lanes, and above streets there are traffic lights like on toll booths which say what lane to use. Any pics of that example maybe?
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Old August 3rd, 2007, 09:02 PM   #63
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shared i mean is being used only by driver's decision. there are no any lights which inform which lane to use. such roads were usually in rural places as there was no much traffic.
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Old August 3rd, 2007, 09:15 PM   #64
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Quote:
Originally Posted by coth View Post
there were many 1+1+1 roads (1 shared lane) in soviet union. most of them currently rebuilding into 2+2.
Yeah i saw some pics of the M7 from Moskva via Nizhny Novgorod to Kazan. Looked quite good.
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Old August 3rd, 2007, 10:03 PM   #65
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Quote:
Originally Posted by coth View Post
shared i mean is being used only by driver's decision. there are no any lights which inform which lane to use. such roads were usually in rural places as there was no much traffic.
well... first posts were sceptical about that middle lane such as causin' accidents... then why not putting a traffic lights during the rush hours... so trucks and slow vehicles could be easily bypassed... this could be controlled by cameras and computer control center somewhere...
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Old August 5th, 2007, 01:59 PM   #66
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Quote:
Originally Posted by Rebasepoiss View Post
I haven't heard anything about 2+1 roads being deathtraps in Finland.
The problem with modern 3-lane, 2+1, roads without a central barrier is the fact that people tend to drive pretty fast, almost at motorway speeds there. Without a guard rail/concrete barrier in the middle, head-on crashes still happen - with disastrous consequences. The safety-minded Swedes acknowledge that these accidents are the worst and that central barriers eliminate them. Thus, they build a lot of central barriers on their 2+1 (and 13-metre 1+1) roads.
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Old April 8th, 2010, 04:13 PM   #67
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Any new experience with 2+1 roads? Maybe some 2+1 roads are built or some reconstructed to 2+2 or 1+1 (due to security reasons)? I'm quite interested in this type of roads...
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Old April 8th, 2010, 05:00 PM   #68
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Any new experience with 2+1 roads? Maybe some 2+1 roads are built or some reconstructed to 2+2 or 1+1 (due to security reasons)? I'm quite interested in this type of roads...
DK4 Poland

[img]http://i40.************/ivuyb9.jpg[/img]

[img]http://i42.************/33to6q9.jpg[/img]
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Old April 8th, 2010, 05:15 PM   #69
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Old April 9th, 2010, 12:28 AM   #70
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Test for new German design of 2+1 roads:
[IMG]http://i40.************/332zcax.jpg[/IMG]
[IMG]http://i42.************/iqhgsz.jpg[/IMG]
[IMG]http://i42.************/qwx9ua.jpg[/IMG]
[IMG]http://i44.************/sphtfs.jpg[/IMG]
(B83 near Hameln)
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Old April 9th, 2010, 12:35 AM   #71
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what does that green line mean?
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Old April 9th, 2010, 01:53 AM   #72
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Originally Posted by zsimi80 View Post


what does that green line mean?
AFAIK it has no real meaning. It is more an optical divider.
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Old April 9th, 2010, 07:47 AM   #73
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1x2 is actually pretty common in Nova Scotia, except they come and go for either direction.

Most of our highways are 1x1 (especially outside the HRM). The 1x2 sections are added every so many kilometres so traffic can pass. There are no highways, to my knowledge, that are strictly 1x2 in Nova Scotia.

Here are some of examples of how 1x2 works around here.

This one is really good for the first minute or so, with consistent and regularly alternating 1x2. This is Highway 107 west from Musquodoboit Harbour.



Where Highway 101's median separated 2x2 becomes an unseparated 1x1, the highway makes use of regular 1x2. The 101 is currently being twinned, as you can see on the right. This was filmed last fall; the construction is expected to be done by September of this year, if not sooner. I can't wait!

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Old April 9th, 2010, 09:07 AM   #74
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Quote:
Originally Posted by ufonut View Post
DK4 Poland
As I see, there are 2 types of 2+1 road shown - one with safety barrier and one without. I think that you should try to avoid using different variations because it might be confusing for drivers.
Why such 2 types are used?

To all other respondents:

Aren't there any problems with organizations that are responsible for safety on roads. It's obvious that possible accidents might be head-on collision... Don't they insist on increasing safety measures on 2+1?

Some time ago there was an idea of creating one test road (2+1) here in Latvia too. Quite good road for such reconstruction was Riga bypass A5 (up to 27% of traffic were heavy trucks). 2+1 road would allow to overtake safer.

Now this idea is almost forgotten:
1) because of lack of funding;
2) AADT has decreased and probably it will decrease this year too. For now there is no need for improving existing two lane road;
3) might be problems with organization responsible for safety on roads;
4) lack of experience with such roads. Do we need barrier or not...and so on.

By the way, is there someone from Finland? I'm a bit interested in Finnish 2+1 roads and I would be grateful for some help.


EDIT:

Have you got any pictures with intersections on 2+1? I'm interested in them too...

Last edited by Jevpls; April 9th, 2010 at 09:24 AM.
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Old April 9th, 2010, 09:48 AM   #75
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We have a few 2+1 roads here in Denmark. I find them a lot better and safer than normal roads, but not as safe as a motorway. These 2+1 roads are usually built in parts of the country where I would not want a motorway.

Our brothers in Sweden, have some VERY sweet 2+1 roads for long stretches, where the total traffic would not justify a motorway. Also, their 2+1 roads blend in with the nature very nicely (I've mainly driven on 2+1 roads in Halland Län)
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Old April 9th, 2010, 09:57 AM   #76
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Quote:
Originally Posted by Spikespiegel View Post
I find them a lot better and safer than normal roads, but not as safe as a motorway.
They can't be as safe as motorways. They usually are built when AADT is:
too high to allow ordinary 2 lane road to work safe enough;
too low to build 4 lane motorway.

So 2+1 is middle part between ordinary 1+1 to 2+2.
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Old April 9th, 2010, 10:25 AM   #77
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Quote:
Originally Posted by Jevpls View Post
They can't be as safe as motorways..
I didn't say they were as safe as motorways?

The Swedish ones comes damn close to being as safe as a motorway, though!
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Old April 9th, 2010, 10:43 AM   #78
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Here in Denmark, the leading political party Venstre, has recently presented some plans for a number of roads, to be extended to 2+1 roads, see map below. Now awaiting money from the parliament.



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Old April 9th, 2010, 10:55 AM   #79
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Fender56, have you got information about approximate AADT on these roads now?
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Old April 9th, 2010, 11:12 AM   #80
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Quote:
Originally Posted by Jevpls View Post
Fender56, have you got information about approximate AADT on these roads now?
If you open the link below, you´ll be able to click on the different areas, and see the traffic numbers by 2008.:

http://www.vejdirektoratet.dk/dokume...t&objno=245000

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