Me-1

[RobNav15]

The Me-1 is the main road in Menorca, Spain. I have noticed a few intresting things about it.

First, it is the only road I have been on where there has been grade separated junction when only single carriageway roads are involved. Here is a good example in Alaior: https://www.google.co.uk/maps/@39.93282 ... a=!3m1!1e3 Is this normal in Spain or any countries for that matter and are thee examples back home.

Secondly they have really cool roundabout junctions over there which give priority to one road.
Examples:
https://www.google.co.uk/maps/@39.89323 ... a=!3m1!1e3
https://www.google.co.uk/maps/@39.89323 ... a=!3m1!1e3

[Mark Hewitt]

There are plenty of S2 GSJs in the UK B6344 A697 near Rothbury being one example.

[Johnathan404]

There are plenty of S2 GSJs in the UK B6344 A697 near Rothbury being one example.

Indeed there are, but these are mostly built to a suitably low standard. The example given shows two consecutive junctions each with four distinctive slip roads. You have to wonder why a road with such a low capacity deserves such well-built junctions, other than to save every possible second for traffic.

The second example I'm more confused by. It looks like a roundabout with a well-aligned filter lane.

[Truvelo]

Spain is full of GSJ's on S2's. Furthermore, a lot of them are on roads running parallel to tolled motorways. Quite why this is surprises me as it provides an attractive route for shunpiking.

[Mark Hewitt]

Spain is full of GSJ's on S2's. Furthermore, a lot of them are on roads running parallel to tolled motorways. Quite why this is surprises me as it provides an attractive route for shunpiking.

There's quite often motorway standard D2 roads running alongside tolled motorways.

[Osthagen]

GSJs on S2 also found here, for example, on the A68 near Dalkeith.

You could furthermore argue that the A66/B6542 interchange at Appleby is a junction of this type. The A66 is D2 east of here and S2 to the west.

[FosseWay]

It's true that GSJs on S2s are relatively uncommon in the UK (and some of those that exist are "accidental", as a result of the topography rather than being engineered as such from scratch), but they're very common in other countries, not least Scandinavia. Here the traffic volumes often do not justify dual carriageways, but the advantages to flow and safety provided by GSJs are still valid. It's also easier to keep annoyingly large wildlife off the highway if there aren't a load of at-grade junctions all over the place. Roads with GSJs tend also to be prohibited to cyclists, pedestrians and horse riders, so it is possible to install cattle grids without impeding the flow of traffic on minor roads which those user groups do use.

[Mark Hewitt]

Secondly they have really cool roundabout junctions over there which give priority to one road.
Examples:
https://www.google.co.uk/maps/@39.89323 ... a=!3m1!1e3
https://www.google.co.uk/maps/@39.89323 ... a=!3m1!1e3

Again not entirely unknown in the UK. https://goo.gl/maps/gN8qT4QScgP2

[c2R]

Spain is full of GSJ's on S2's. Furthermore, a lot of them are on roads running parallel to tolled motorways. Quite why this is surprises me as it provides an attractive route for shunpiking.

There's quite often motorway standard D2 roads running alongside tolled motorways.

Or even free motorways running next to toll ones:
https://www.sabre-roads.org.uk/maps/ind ... 13&layer=0

[Mark Hewitt]

Spain is full of GSJ's on S2's. Furthermore, a lot of them are on roads running parallel to tolled motorways. Quite why this is surprises me as it provides an attractive route for shunpiking.

There's quite often motorway standard D2 roads running alongside tolled motorways.

Or even free motorways running next to toll ones:
https://www.sabre-roads.org.uk/maps/ind ... 13&layer=0

That's the actual one I referring to above.

[scragend]

Secondly they have really cool roundabout junctions over there which give priority to one road.
Examples:
https://www.google.co.uk/maps/@39.89323 ... a=!3m1!1e3
https://www.google.co.uk/maps/@39.89323 ... a=!3m1!1e3

Again not entirely unknown in the UK. https://goo.gl/maps/gN8qT4QScgP2

Indeed. Here's another: https://goo.gl/maps/DG5Wm7ZVw5y.

[Burns]

Are there any road junction types present in other countries that we have no examples of at all? Norway has a lot of junctions, both flat and grade separated that are entirely underground but I know there's something similar in London and under the Mersey.

[c2R]

Are there any road junction types present in other countries that we have no examples of at all? Norway has a lot of junctions, both flat and grade separated that are entirely underground but I know there's something similar in London and under the Mersey.

I don't think we have any signed four way stops. There's a few in Ireland but I can't think of any in the UK.

[Burns]

Are there any road junction types present in other countries that we have no examples of at all? Norway has a lot of junctions, both flat and grade separated that are entirely underground but I know there's something similar in London and under the Mersey.

I don't think we have any signed four way stops. There's a few in Ireland but I can't think of any in the UK.

I stayed in Mariposa, CA for four days last year and I can't say I liked using the one in the town there that much but that might just be down to a lack of familiarity. People generally waved me through when it was my turn to move but I was quite cautious about doing so.

[Truvelo]

Four way stops can be an advantage over roundabouts where there's a dominant movement over the others. Because each approach to a four way stop takes it in turns to pull out it means traffic downstream of the major flow doesn't get stuck waiting for a break in the traffic.

[Bryn666]

Are there any road junction types present in other countries that we have no examples of at all? Norway has a lot of junctions, both flat and grade separated that are entirely underground but I know there's something similar in London and under the Mersey.

I don't think we have any signed four way stops. There's a few in Ireland but I can't think of any in the UK.

We have some unlawful four way Give Ways though. Stop signs in the UK are used primarily for road safety where visibility is poor, they are not used as traffic calming as is done in the rest of the world.

[ScottB5411]

Are there any road junction types present in other countries that we have no examples of at all? Norway has a lot of junctions, both flat and grade separated that are entirely underground but I know there's something similar in London and under the Mersey.

I don't think we have any signed four way stops. There's a few in Ireland but I can't think of any in the UK.

We have some unlawful four way Give Ways though. Stop signs in the UK are used primarily for road safety where visibility is poor, they are not used as traffic calming as is done in the rest of the world.

The USA is (slowly) realizing roundabouts have a far greater benefit at a sizezble number of 4 way stops

[Mark Hewitt]

The USA is (slowly) realizing roundabouts have a far greater benefit at a sizezble number of 4 way stops

As I'm always pointing out the UK equivalent of the 4 way stop isn't really the roundabout but the standard give way to the main road type arrangement. We tend to use roundabouts where traffic lights would exist in the US.

As far as I can tell the US really only has 4 way stops because of the grid systems, if you don't want to prioritise a particular flow in a grid then 4 way stops make sense.

[ScottB5411]

They are massively overused here Mark, most of the time they interrupt traffic flow for no reason at all on roads which have little traffic so the side roads would have no issue getting out anyway. They are out in the middle of nowhere, where there is no traffic for miles so you have to come to a grinding halt for no reason, they are at junctions which clearly need traffic signals but instead everyone queues for 10 minutes awaiting their turn. Roundabouts are greatly welcomed in my opinion and the Americans are warming to them also now they are getting used to them

[multiraider2]

Are there any road junction types present in other countries that we have no examples of at all? Norway has a lot of junctions, both flat and grade separated that are entirely underground but I know there's something similar in London and under the Mersey.

I don't think we have any signed four way stops. There's a few in Ireland but I can't think of any in the UK.

We have some unlawful four way Give Ways though. Stop signs in the UK are used primarily for road safety where visibility is poor, they are not used as traffic calming as is done in the rest of the world.

Bookham in Surrey, has in very close proximity: A four-way give way and A traffic island and block paving crossing that every time I've been there, every driver treats as a Zebra Crossing.

I know not legal is not good, but I have to say that traffic seems to do very well at the four way give way and better than at some mini roundabouts, which have people from four directions looking at each other.