M50 M11 construction

Cookie_Monster

Anyone know what all the construction going on at the side of the M11 M50 is, lots of trees and earth removed. Look like very deep bays for pulling over. There on near Bray exit and Sandyford at least, i'm fairly sure there are a couple more alongt he way too.

Stark

Last I heard they were meant to be installing ramp metering there at some point.

Cookie_Monster

whats "ramp metering"?

Stark

Essentially traffic lights on the slip coming from Loughlinstown to limit the flow of vehicles onto the mainline in heavy traffic. In theory improving overall capacity as mainline traffic ceases to come to a standstill.

Cookie_Monster

Stark wrote: »

Essentially traffic lights on the slip coming from Loughlinstown to limit the flow of vehicles onto the mainline in heavy traffic. In theory improving overall capacity as mainline traffic ceases to come to a standstill.

oh yeah, I'd heard about that alright. But why is the same kind of clearing/structure being built just south of the Sandyford exit then too?
I can't see lights being needed there and its too far down from the ramp for that anyway I reckon

NFD100

VMS/ electronic sign gantries? Drove past it the other day, looked like it to me.

New Welcome to Dun Laoghaire Rathdown signage on northbound M11. Nothing for auld Wickla going south

Alun

Cookie_Monster wrote: »

whats "ramp metering"?

Essentially traffic lights on the on ramps to restrict the numbers of cars joining the motorway at selected places. All computer controlled based on traffic volumes on the mainline. They have them in the Netherlands where they work well.

See http://www.dlrcoco.ie/planning/Part8/Wilford_Interchange.htm and http://www.wicklow.ie/apps/wicklowbeta/News/Part8_M11.aspx

Alun

NFD100 wrote: »

VMS/ electronic sign gantries? Drove past it the other day, looked like it to me.

New Welcome to Dun Laoghaire Rathdown signage on northbound M11. Nothing for auld Wickla going south

Yeah, I'd say that's more likely .. it looks like they're just putting in some kind of foundation / footings for the gantries, or may extra lighting?

The whole ramp metering thing is most likely to be put on the long finger for the mean time I'm guessing.

Cookie_Monster

NFD100 wrote: »

VMS/ electronic sign gantries? Drove past it the other day, looked like it to me.

New Welcome to Dun Laoghaire Rathdown signage on northbound M11. Nothing for auld Wickla going south

that sound like a reasonable explanation alright.

Bluetonic

NFD100 wrote: »

VMS/ electronic sign gantries? Drove past it the other day, looked like it to me.

Lots of work on the M1 too between Ballough and Swords to install the same.

L1011

Is the M1 not extensively VMS'ed already?