antoobrien wrote: » It's a red herring because if there was an ounce of truth to it the evening rush should be orders of magnitude lighter, seeing as how it starts after the school run finishes.. It's not, if anything the evening rush is longer and more severe than the morning rush, but hey lets ignore the fact that the schools have almost no effect on this.
what_traffic wrote: » 1st step - We need to KILL car traffic in Galway. Traffic in itself is not a problem. I agree with IWH - "Modal shift " is the first step in that process. Pedestrians, Cyclists, Public Transport User's need to be accomodated(in that order) above Private Car Motorists. Car parking and road space in the city centre will need to re-allocated.
SeanW wrote: » So you are advocating a "modal-shift only" solution. Question: say I am from the Midlands and I want to get to Salthill. How will your strategy help? Or say Joe Public lives in Spiddal and wants to go to Athlone. How will your strategy help - assuming for the sake of argument that the bypass is on the long finger.
galwaycyclist wrote: » There will be substantially less city-generated short distance car travel. Therefore this frees up system capacity for other kinds of trips including other kinds of car trips.
Iwannahurl wrote: » It is widely recognised that during the summer, when tourist influx peaks, traffic flow both within and through Galway City, including that infernal triangle, is markedly improved. That's why major roadworks are done during the summer months, and it's also why there is gridlock when school-related traffic descends on the city in August, as parents and their kids scramble to buy uniforms and books.
Iwannahurl wrote: » http://www.galwaynews.ie/21133-city-council-denies-roadworks-sole-cause-traffic-chaos
Iwannahurl wrote: » Can you please address, with reference to independent sources, these two main points: 1. That even small reductions in traffic volume can bring about a significant improvement in traffic flow, viz. reducing traffic volume from 2,000 to 1,800 vehicles per hour (a 10% reduction) shifts a roadway from Level of Service E to LOS D. See visual depiction of LOS below.
Iwannahurl wrote: » 2. That throughput can be maximised on the same roads network, or through the same bottleneck/pinchpoint, by rigorous traffic management, as per the Washington State Department of Transportation rice funnel analogy.
Iwannahurl wrote: » The fundamental principle is that the same infrastructure can become highly inefficient due to lack of active management or made highly efficient through TDM.
Iwannahurl wrote: » Is that principle valid or is it not? If not, can you point to authoritative sources to support such a conclusion? Links etc please.http://subregional.h-gac.com/images/Multimodal_level_of_service_1.jpg
There is a tendency for TDM policies to focus only upon choice of travel mode, but this is just one factor in the traffic/congestion generating mix. There are a group of factors that constitute transport demand. 1 . These factors include the total number of trips, trip length, mode used and vehicle occupancy. Policies for reducing congestion also require a consideration of the location and time of travel.
SeanW wrote: » But remember that for any traffic removed (by "encouragement" more like force I might add) a corresponding amount of road space is taken away from motorists. That's the plan. So even if heaps of traffic are removed, there will be no net improvement in traffic speed. Additionally, IWH wants a dramatic clampdown on speeding - also to help motorists no doubt :rolleyes: - and reduced speed limits, having taken and clearly expressed the view that the current roads forming the N6 in Galway are not suitable for high speed long distance traffic.
antoobrien wrote: » Can you show anywhere where this is actually true. We are only guessing, based on national figures that there has been a 10% drop in traffic. You yourself have claimed that there is more traffic in Galway. That rice funnel analogy is flawed because it's a single entry single route system. Show me a transport system in the work that works that way. The only reasons such rubbish appeals to you is that it suits your argument, not that it's in any way practical. I'd love to see how TDM will solve the multiple crossing traffic flows we have - which is what causes the congestion. Very shortsighted, so no not at all valid because it's looking at results not causes.http://design.open.ac.uk/potter/documents/PotterpaperGCET.pdf Your TDM strategy chooses to cherrypick perceived problems that are at best minor irritations in the scheme of things.
antoobrien wrote: » The benefit [of the GCOB] will be removing cars, vans & lorrys from the Galway Triangle (I'm claiming copyright on this) of Moneenagesha to HRR (aka Bodkin RAB) to Ballinfoyle (Kirwin RAB) that don't need to be there. I've added this diagram to illustrate the point. 99% of the cross town traffic comes through one of the 4 junctions in this area (there are a couple of back roads that can be taken if you can find them) There are approx 37,000 trips (18,000k two way trips) happening on QB daily in 2009 ... [and] about 60,000 trips coming from the Galway Metropolitan Smarter Travel Area. In the 2006 census there were approx 9,500 two way journeys to work or school of 5-9km out of just over 50,000 recorded trips.I'd expect at least half these to use the Bypass. (meaning a reduction of up to 10k trips going through the Galway Triangle). We need to also consider the effect of the current traffic layout. It comes to a standstill on entering Galway due to the crossing traffic streams. The effect of this will be reduced by traffic going to the Woodquay area using the Bypass to go to the Ballindooley junction etc.
antoobrien wrote: » The real problem with the situation in Galway is that all the traffic is being forced into into one small area, the Galway Triangle (copyright me, 2011). All roads from the East of Galway lead to one of the 4 junctions within this triangle. It is almost impossible to avoid them if you are attempting to get a) into the center of town or b) across the riverSimple logistics dictate that this will eventually become a choke point.
Iwannahurl wrote: » You appear to be refusing to engage with evidence or recognised principle, in order to defend a fixed position regarding the GCOB.
Iwannahurl wrote: » Clearly the congestion is caused not merely by "multiple crossing traffic flows" but by the volumes of traffic involved.
Iwannahurl wrote: » The rice-funnel demonstration is just an analogy, an attempt to illustrate the basic principle that throughput can be improved with TDM even if the infrastructure of interest stays the same.
Iwannahurl wrote: » You yourself have stated that "the real problem with the situation in Galway is that all the traffic is being forced into one small area", which you have called the Galway Triangle. According to yourself, "simple logistics dictate that this will eventually become a choke point."
Iwannahurl wrote: » I'm not cherrypicking anything.
Iwannahurl wrote: » I'm saying that serious attempts should be tried, using multifaceted TDM strategies, to reduce the volume of traffic going through the Galway Triangle (©) chokepoint in order to achieve a summer-season Level of Service for motorised traffic.
Iwannahurl wrote: » Based on the numbers you quote above, are you saying TDM could not in any circumstances achieve a reduction in traffic that "doesn't need to be there" to an extent that would produce the desired LOS? If not, why not?
antoobrien wrote: » I'm going by the evidence that my own eyes provide me with day in day out. How much more evidence do you want? Okay then, what causes the traffic on the Tuam Rd to regularly back from the N17/N6 junction back past Liosban/Riverside and through cemetery cross in the evening and often well past Castlegar church going in the way? It couldn't be the fact that there's a crossing traffic stream, could it?
antoobrien wrote: » In order to show that your strategy has any validity - and the fact that even in the "lighter" summer traffic that backs up from the N17/N6 throughcemetery cross most evenings shows that the traffic is not aas light as perceived - you'll have to show an understanding of where the traffic is going. Then you can try controlling the demand. The use of the 4km bubble rubbish and the harping about P&R which is proven to be useless in Galway except as a way of helping shoppers not have to look for parking, shows that you have no understanding of where traffic is flowing in Galway.
what_traffic wrote: » Nope - its the first step.
We also need to bring in resident's parking. For example - the streets in; the Claddagh, Woodquay, the West, Lower Salthill. Should only be for residents ONLY - not Pay and Display.
SeanW wrote: » I will admit some intellectual laziness here in that I am, to a certain extent, lumping you, monument and Iwannahurl in the same category of anti-bypass posters advocating at best a modal-shift first strategy.
SeanW wrote: » Are you sure about that? Salthill by the Promenade, between the prom itself, the leisure complex and the casinos, is a major draw for tourists and daytrippers.
markpb wrote: » I wouldn't call it intellectual laziness, I'd call it an inability to debate the topic at hand. Your entire post picks on posters you disagree with and tries to sideline them.
You say that someone must be wrong if they disagree with you. With the exception of the last two lines, all you did was tell the poster that they must agree with your opinion before you'll discuss it with them. If you don't want to listen to contrary opinions, why are you posting here?
I am referring to Lower Salthill. Whitestrand Rd/Av, Salthill Road Lower; the residential parts of the village which are on the City side of the village.
Aard wrote: » It seems that everybody's colours are nailed fast to their respective masts, and that nobody is willing to budge. Perhaps a more fruitful discussion than whether or not a bypass is needed would be: if and when (at some point in the future) a bypass is needed, where should it go, where should the interchanges be, and how should demand for the future bypass be managed to ensure maximum throughput at peak hours. These decisions will have to be made at some point and will have a huge impact on the future economy and spatial development of Galway. Improving bicycle infrastructure, for example, means nothing if the future bypass ends up encouraging mass greenfield development and the suburbanisation of retail activity. Non-drivers should be very interested in the design and location of urban roads, and not just in the sense of whether-or-not they go ahead. It's not an either-or in many cases, and sometimes non-drivers shoot themselves in the foot by refusing to engage with the design debate. A well-designed urban dual carriageway can have just as many knock-on benefits for non-drivers as it does for drivers. Perhaps a new full-on motorway isn't the solution - is there any scope to fully grade-separate the N6/R338? Would building a new motorway with interchanges on the outskirts create further suburbanisation and car-dependence? These are questions, among many others, that need to be explored by both sides.
Iwannahurl wrote: » new roads generate traffic (bad) ... serve to facilitate car use (bad) traffic congestion is ... the biggest deterrent to increased car use sustainable unsustainably sustainable
Iwannahurl wrote: I do not want this for my kids ...A bypass will not make any of that go away.
SeanW wrote: » See what I mean? Thank you for proving my point so cogently yet again. The bypass will indeed not make any of that go away because it's not supposed to. It's designed to solve a different problem, partly independent of the ones you outlined.
galwaycyclist wrote: » For some reason for years various interests have tried to make a by-pass "the price to be paid" before we can have any "progress" in improving conditions in the city. During the discussions regarding the 2004-2011 City Development Plan, Joe Tansey, the official who now heads the city transport unit, was trenchantly opposed to having bus lanes on the reconstructed Seamus Quirke Road. He insisted that it would not be appropriate to put in bus lanes unless a by-pass was built first. Our elected councillors faced him down and voted to put in bus lanes anyway.
Iwannahurl wrote: » Well now, that's interesting. I knew that Galway City Council had originally sought a very different SQR (eg lots of roundabouts) and had to be forced to adopt a different approach. However, I was not aware, or perhaps had completely forgotten, that they tried to use the proposed bypass as a bargaining counter.
Were a bypass to be built, the political imperative for better public transport, cycling infrastructure, TDM, speed management, parking controls etc would substantially diminish, imo.
Translation from IWHspeak to English wrote: Not only am I clearly terrified that the bypass would do its job and be successful, but I'm also using it as a bargaining chip to force my agenda of "sustainability" to keep everyone stuck in traffic until I GET MY WAY because it appears I want people to suffer needlessly unless they knuckle under and admit that my solutions are the only ones. And then with a straight face I accuse other people of using the bypass as a bargaining chip while doing it myself ...
galwaycyclist wrote: » In fact as others have pointed out, a by-pass if used in combination with existing roads management and policing practices, will likely make existing long-established problems worse.
The sky has not fallen, the earth has continued to move in its orbit.
SeanW wrote: » So ... if a bypass takes traffic out of the city (which IS the objective) that could make things worse on the roads in the city itself? That's a bit claiming that the Dublin Port Tunnel was a bad idea because it could lead to worse problems on the Quays.
And people continue to waste time needlessly going through urban areas they don't need to be going through - to the detriment of all concerned - because of anti-road campaigners like Peter Sweetman, and other eco-leftist groups nationwide like Save Newgrange and what they're doing to the people of Slane.
what_traffic wrote: » P&R is not rubbish - its the way it's being rolled out.
antoobrien wrote: » Another reason why your P&R argument is tosh is that the day rate for all those carparks is either the same or higher than the cost of the P&R, so the question is why isn't the P&R being used? The coach station is at the fairgreen, so it's not like it's not targetting the audience you think they should be. It's not convenience or timing, peak usage was when it was most frequent.
what_traffic wrote: » Can you provide quotes from myself to back up some of these points you make here?
antoobrien wrote: » The one quoted, your contributions to this thread arguing for the removal of parking from a certain city centre location - your argument targets parking in general, the post in question is specifically about city centre parking.
antoobrien wrote: » The coach station is at the fairgreen, so it's not like it's not targetting the audience you think they should be.
galwaycyclist wrote: » A case in point being that the Port Tunnel was accompanied by a HGV ban on the Quays. It is not the Port Tunnel that has had the transforming effect but the HGV ban. The tunnel was one way of enabling the HGV ban but there may have been others.
No the primary reason people are wasting time going through urban areas they don't need to go through is incompetent planning, traffic management and policing. Throwing more roads at that mixture is like trying to put out a fire by pouring petrol on it.