Lane choice on this roundabout

DanieliMurphy

Hello all,
I was planning a trip the other day and came to this roundabout.

The ground markings show I can turn right from the middle lane.
https://prnt.sc/jgb0v4

But it would appear following this lane takes me to the second instead of third exit.
https://prntscr.com/jgb1n8
The red shows me the way the middle land will take me. If anyone could shed some light on this I would be grateful.

SCOOP 64

Cant seem to open up links.

DanieliMurphy

Remove the space between https and :

verycool

SCOOP 64 wrote: »

Cant seem to open up links.

Need to remove the space between the http and the : because of a new poster can't post direct links.


I agree, the markings are very confusing all right.


It almost looks like you need to change lanes just after the first exit!


Do you have a google map link to this roundabout?

DanieliMurphy

https://tinyurl.com/yadxr5nl

dclifford

I don't think there is a way to use the roundabouts on that road. Well, there is, but they are daft. Everyone takes a different line/path. If you can navigate them without crashing, you are good.
They have to be the most illogical design I can think of. Very difficult for anyone who has not used them before, especially when the road is busy and people who know them treat them like regular roundabouts.

When the road first opened I thought it was an experiment, but they are still there.

kadman

Surely each of the 3 entrance lanes to the roundabout, correspond

to exits 1, 2 and 3 as calculated from your entrance position.

Left hand arrow exit 1, mid arrow/R exit 2, and right arrow last exit ??

Of course thats easy to ascertain for a bird.:-)

Alanstrainor

kadman wrote: »

Surely each of the 3 entrance lanes to the roundabout, correspond

to exits 1, 2 and 3 as calculated from your entrance position.

Left hand arrow exit 1, mid arrow/R exit 2, and right arrow last exit ??

Of course thats easy to ascertain for a bird.:-)

If I was using this roundabout I would take a position in the right most lane and proceed around, moving in to the right lane of the roundabout as it becomes available. But the markings clearly show that middle lane can turn right also. In order to do this you would have to change lane mid roundabout which is fine, but a bit of a complicated one.

Really this is an awful roundabout. I would doubt any tests are done here, but it's certainly an interesting thread!

dclifford

kadman wrote: »

Surely each of the 3 entrance lanes to the roundabout, correspond

to exits 1, 2 and 3 as calculated from your entrance position.

Left hand arrow exit 1, mid arrow/R exit 2, and right arrow last exit ??

Of course thats easy to ascertain for a bird.:-)

But as the op pointed out the "mid arrow/R" doesn't really go to the right. The lane on the right gets forced to the centre/outside by the crosshatch and that cuts off the people who may have started in the middle lane thinking they could follow the arrow and leave on the 3rd exit.

As I mentioned earlier people who use the road regulary, in the most part, ignore the markings and use it like a normal roundabout.

runawaybishop

The exit from the ops pic has two lanes so the entrance is correct to show the middle and right lane can both go right?

Looks ropey as hell though. People can barely work single lane 3 exit roundabouts as it is.

2Mad2BeMad

middle and inside lane goes right
middle lane can go straight as well

your drawn line for the inside lane is wrong, it has you switching lanes on the roundabout which your not allowed to do, you enter on the inside lane you get off at exit 3 lane2 only, you cant switch to lane 1 on exit 3 as that is for the middle lane only

dclifford

Alanstrainor wrote: »

Really this is an awful roundabout. I would doubt any tests are done here, but it's certainly an interesting thread!

There is about 6 or 7 of these roundabouts between M2 and far side of Tyrellstown. I have seen trucks topple over on them because the lane change and being push wide was not expected. This was the roundabout that had the cctv footage of the car leaping and landing in the middle of it.
The centre lane on each roundabout will bring you to different exits depending which roundabout you enter. You definitely need experience on these or you will get caught out.

dclifford

2Mad2BeMad wrote: »

middle and inside lane goes right
middle lane can go straight as well

your drawn line for the inside lane is wrong, it has you switching lanes on the roundabout which your not allowed to do, you enter on the inside lane you get off at exit 3 lane2 only, you cant switch to lane 1 on exit 3 as that is for the middle lane only

These are not ordinary roundabouts. The cross hatching causes the need to change lane. For example lets say you need to do a full turn of the roundabout, you have to change lane at least twice.

DanieliMurphy

2Mad2BeMad wrote: »

middle and inside lane goes right
middle lane can go straight as well

your drawn line for the inside lane is wrong, it has you switching lanes on the roundabout which your not allowed to do, you enter on the inside lane you get off at exit 3 lane2 only, you cant switch to lane 1 on exit 3 as that is for the middle lane only

I assume I wouldn't be switching lanes if the road markings force me to the outside after the first exit, unless I am supposed to take lane after the crosshatching as I pull out?

runawaybishop

dclifford wrote: »

These are not ordinary roundabouts. The cross hatching causes the need to change lane. For example lets say you need to do a full turn of the roundabout, you have to change lane at least twice.

Are you allowed to do a full turn of the roundabout? I don't see any reason to change lanes. Enter middle lane, exit left lane on right, enter right lane, exit right lane on right.

the_pen_turner

2Mad2BeMad wrote: »

middle and inside lane goes right
middle lane can go straight as well

your drawn line for the inside lane is wrong, it has you switching lanes on the roundabout which your not allowed to do, you enter on the inside lane you get off at exit 3 lane2 only, you cant switch to lane 1 on exit 3 as that is for the middle lane only

that couldnt be farther from the truth

Alanstrainor

runawaybishop wrote: »

Are you allowed to do a full turn of the roundabout? I don't see any reason to change lanes. Enter middle lane, exit left lane on right, enter right lane, exit right lane on right.

There's nothing to stop you going all the way around the roundabout. Certainly nothing illegal about doing so. But if we take the OP's example of the middle and outside lanes both having arrows for turning right, at least one person is going to have to change lane midway around the roundabout, as the middle/inside lane only makes it to the 12 o'clock position (or straight through).

And even if I was taking the right hand exit, and using the outside/right most lane I would still change lane once going around this one. Once passed the first hatch marking I would move into the rightmost lane and follow that one to the exit. Making sure to exit in the outside lane of the dual carriageway beyond.

Truly awful roundabout. I can make sense of it with a birds-eye view on my couch, but on approach there is no indication of what's to come, nor any signage. Typical.

DanieliMurphy

Typical indeed, I'll just stick to the right and see how it goes, cheers guys

kadman

Seems there is no info either on the RSA website about these type of roundabouts.

http://www.rsa.ie/Documents/Road%20Safety/Leaflets/Leaf_booklets/Roundabouts_DL_2012_v3.pdf

Imagine a learner drivers dilemma halfway around one of these.