lovelyhurler wrote: » This has probably been asked before as well, but why cannot we put roads (flyovers) on stilts, instead of all that banking? Like Richard said - is there a structural/technical or economic reason for it?
hi5 wrote: » If you ever drove over this thing in East London, you'd know why. The only consolation was that so many are afraid to drive over it that you have it all to your self sometimes.https://www.google.ie/maps/@51.5925663,0.2129779,3a,75y,270h,90t/data=!3m4!1e1!3m2!1sQd5ghY0smeGowyz4AoYDKA!2e0
ukoda wrote: » How do they make this work so well in the US tho? they have most of their highways and junctions in the cities up on raised roads.
Cap1 wrote: » I heard today.The first cars will be over the bridge on the October bank holiday.
rameire wrote: » it is that wide as it will also accommodate at some time in the far future, the Metro.
spacetweek wrote: » Yep that's it.
ukoda wrote: » and does anyone know why the western side wall under the bridge is sloped outwards, while the wall on the east is a normal straight wall if that makes sense
endacl wrote: » It's a buttress. Support.
Carawaystick wrote: » I'd say there's a big economic reason, concrete stilts need cement, rebar Then they need to be designed for the load, beams again need to take the load They will also have a more limited lifetime, due to the small dynamic loading and unloading. Basically putting it on stilts is increasing the length of the "bridge" and bridge lengths are generally minimised
MYOB wrote: » Maintenance costs more than anything else.
Chris_5339762 wrote: » Also, the areas underneath them are havens for antisocial behavior and look far, far worse than an embankment.
Geogregor wrote: » <snip> Then if problem occurs inside the embankment, how do you fix it?
Geogregor wrote: » Like Carawaystick I also think decision was made mostly based on the construction cost. Sure there are maintenance costs there but most of them are related to fixing surfaces, lighting, drainage or signage and you have to do it on the embankments too. The concrete bridge structure itself doesn't require that much maintenance. As for antisocial behavior, in such windswept location it probably wouldn't be a major problem. Most of the problems like that occur closer to the inner cities. BTW, how about lifespan of this reinforced embankments? There are metal strips in the soil holding the walls. At least I hope they are made of stainless steel. Those reinforced embankments are used for last, what 20 years? I wonder how will they look in another 20-30 or 40 years. Will they be as long lasting as brick railway arches build by the Victorians? Then, if problem occurs inside the embankment, how do you fix it?
DeltaDev wrote: » The metal strips are galvanised steel, so no problem with them. The bridge and embankment are designed for a 120 year life. That should see most of us out!
[Deleted User] wrote: » Most of us????
D Trent wrote: » Am nobody told you? Ok here goes. Once you have been promoted to a Moderator on boards.ie, you automatically gain an extra 30 yrs lifespan. You my friend are one lucky ba$tard
TheJaff wrote: » I caught the tail end of a report on LiveDrive this evening and they were mentioning more lane changes for both inbound and outbound this weekend. Anybody have any details?
Good Morning. Firstly, thanks for taking a minute to read this as I understand you must be very busy. As a biker and car driver I travel through Newlands cross each morning and evening and to be honest the traffic management has been superb so far throughout the construction phase. I do want to highlight one area though that I feel is extremely dangerous. As traffic is heading toward the junction from the Naas side, there is a shift of traffic from Lanes 1,2,3 into Bus,1 and 2 respectively, with lane 3 being signed for Belgard road. This is causing a huge problem for bikes filtering towards the junction at times of traffic backlog as car drivers are “diving” down Lane 3 and then cutting across to lane 2 in order to head for the City/M50. I’ve been caught 2-3 times (and missed being hit by a matter of inches) and I’ve seen many other bikes have this happen when in my car queueing. I’d suggest that the lanes get remarked temporarily (as happening in previous phases of the construction) to guide/force traffic from L1 to Bus, L2 to L1 and L3 to L2… with some hatchings / bollards on entry to the Belgard Lane (L3) just after citrywest. I understand these things need planning and time but in the overall scheme I honestly think we could avoid a serious collision and also many “road rage” incidents that are happening as drivers skip the queue by using the Belgard land and cutting back in suddenly in front of queueing drivers. Many Thanks and I appreciate your consideration.
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