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Counters on Porterstown Road

Dr_Colossus

Anyone know the purpose of all the car counters on the Porterstown Road this week? There are a total of ten (10) between the M50 underpass and St. Mochtas Church, some of which are only a few meters apart but not obviously before and after turnoffs such as the busy Porterstown Park.

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daymobrew

I would guess it's to evaluate whether drivers are keeping within the new speed limit (it was reduced from 60km/h to 50km/h).

See the consultation that was held earlier this year.

thenuisance

https://www.boards.ie/discussion/comment/123846846#Comment_123846846

I think that consultation and the current counting exercise are a result of the development at Luttrelstown. That's going to radically alter traffic flow round there.

Flinty997

I remember on something it was highlighted that the bottom of Dr Troy was a congestion hotspot and they were still going to exit Kellystown right into the middle of it. No bridges to the Clonsilla Rd. Closing Clonsilla Level Crossing. They couldn't have planned it worst if they tried.

I wonder how much traffic would take the train if the line was improved.

But I also think it's just inevitable traffic is just going to get worse. Increasing population old roads old towns. Bad planners, vested interests.

I expect D15 will merge with Clonee in the next 10years. It's will just all be built up.

magicbastarder

are the they counters which use pneumatic tubes across the road?

Flinty997

Yeah theres a few there.

With the church and the park they've created quite a bottleneck.

You'd think they should make the park have one entrance at one end then one exit the other end. Left turn only. Very poor design the way they've done it.

Victor

It might or might not have something to do with the Ongar-Barnhill road, which is due to open soon. OpenStreetMap

https://www.boards.ie/discussion/comment/123848330#Comment_123848330

Clonee has been part of D15 for decades. :) The EirCode for Clonee Post Office is D15N62W. https://finder.eircode.ie/

Flinty997

I kinda meant the suburban sprawl in general.

That R149 is utterly changed in the last year.

magicbastarder

My point about the pneumatic counters is that I expect they are not very good at telling if a car is travelling under the speed limit, which another poster suggested as to the reason. They can't tell what the wheelbase of the car is?

magicbastarder

Clonee has been part of D15 for decades. :) The EirCode for Clonee Post Office is D15N62W.

Years ago, a relative worked in a section in Dublin city council where they'd be dealing with queries from the public a lot. They used to have to explain occasionally that whoever was calling had gotten the wrong local authority, and often would redirect them to fingal or DLR etc.

On a couple of occasions, they had to deal with people from in or around clonee - one who got irate about it - who not only were wrong about the local authority, were wrong about the actual county they lived in. They were insisting - incorrectly - that they lived in Dublin not Meath.

Flinty997

Tbh I thought it was Meath, I have a memory of some issues with taxis. Probably wrong though.

Flinty997

https://www.boards.ie/discussion/comment/123848762#Comment_123848762

I assume they don't need to know the wheel base it's just the time between the first pipe and second pipe being crossed by one axle.

magicbastarder

i'd always just assumed they were there for counting traffic volumes.

Pale Red

When I moved to the Littlepace area, around 25 years ago, when I got a taxi and said "Cloner" to give them the general direction I would be told that it was "off the meter". No amount of explaining my reason for saying Cloned when I wasn't going to Clonee would wash. I told the driver I would get out at the edge of the meter area - which we didn't reach. I then started saying Blanchardstown to keep it simple.

daymobrew

https://www.boards.ie/discussion/comment/123848762#Comment_123848762

Ah, good point, they are probably for counting only.

They wouldn't be able to accurately tell speed - though they might be able to approximate by assuming an average wheelbase length. That said, even that would be thrown off by when two vehicles going opposite directions pass go over them at the same time.

magicbastarder

As Flinty997 mentioned, in theory they could by just tracking the time between the two pulses from the front wheel passing over the two tubes (which i assume is just one tube in a loop?)

if the gap between the tubes was 50cm, a car travelling at 50km/h would travel across the two tubes in 0.036s - 36 milliseconds. i don't know if the equipment would be accurate enough to track that reliably.

Flinty997

Why would they need to know wheel base

Flinty997

Looking it up suggests they claim 99% accuracy but comments suggests it's more like 90%.

It measures pressure so two vehicles would be twice the pressure.

Seemed to have two sets of two pipes set up a distance apart.

Flinty997

I imagine they could throw all the data into a programme that works it all out. Or AI these days. It's good at analysis.

That said it's probably traffic volumes.

Former Former Former

Hopefully the end result is improving the access to Porterstown Park. It's carnage up there some nights.

jlang

Could they not use them to detect when the construction vehicles taking up the parking spaces just past the church go away? Then they could come and put in a few cones to save the parking for people who want to go to the the park and church!

donaghs

https://www.boards.ie/discussion/comment/123849294#Comment_123849294

What are you suggesting here? If cars are driving fast on the road, dont know how it affects the way people would be parking in the park. Or is something else?

Flinty997

I assume it's just generally bringing attention to the issue on the road.

Former Former Former

https://www.boards.ie/discussion/comment/123857926#Comment_123857926

Sorry, by 'carnage' I meant congestion with people trying to get into the park, not actual carnage in the sense of crashes and injuries.

The park has one very narrow entrance which exits onto a very narrow road. When the soccer, GAA and running clubs are all on at the same time (e.g. 6pm tonight), it gets very messy.

Flinty997

Can be matches with visiting teams and clubs. All trying to get matches played while there's still light and pitches still dry.

Former Former Former

19 ramps going in between Diswellstown Manor and the junction at the church.

Flinty997

Oh my poor suspension...

daymobrew

So the drivers failed to obey the lower speed limit and those that did obey it will now suffer. A-holes.

The consultation said: Speed surveys will be carried out following the speed limit reduction, and contingent on results, if required, traffic calming measures may be installed.

Dr_Colossus

Wtf, 19? That's a 1.7km stretch of road so there will be a speed ramp roughly every 90 meters, that's can't be right surely?

It's a pretty narrow road and despite cycling it everyday for years and driving along it often enough never found speed to be that much of an issue. Are they going to ruin it like the Strawberry Beds and the sharp/severe ramps that are along there.

Speed ramps are an abomination and should only exist in housing estates where traffic volume is low. What's wrong with technology with a number of average speed cameras along that stretch of road if speed is such an issue.

Flinty997

I would much prefer speed cameras.

I expect they will ruin it like strawberry beds. The issue is obviously lots of people speeding and no enforcement to discourage it.

It's becoming a main commuter route and traffic will only grow on it. There's also a lot of pedestrians and children in it now between Porterstown Park and Sommerton GAA and the Hotel.

Flinty997

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