The all important factor is the number of cars you can flush through a junction in a sort period of time, and the roundabouts no matter how optimised (i.e. This in itsself is a hinderanceįinally the clincher (if I can explain it clearly enough) is the slowness of ability to flush the traffic waiting before a junction - through the junction.Īt a signalised roundabout you have 2 lanes of waiting traffic, 2 lanes around and 2 lanes of exiting (sometimes 3 but still.) So on a green light entering the junction - per second you are only "flushing" 2 lanes through the junction, and even then they can be jolty/ braking and swerving about the place changing lane on the roundabout.Īt a signalised junction say where 2 dual carraigeways meet - you can have say 6 lanes (or more*) stacking before the junction and then "releasing" or flushing that much larger broad mass of cars per second through the junction upon green. Then, you have trafic weaving about amonst each other as it negotiates the roundabout.
They are signalised so already the only real advantage of roundabouts is negated. The lack of efficiency of these constructions is easily explained. Nope, but it does have some well crazy roundabouts like the one in Galway at the shopping centre and the ones being fixed in Cork. Do you really think Ireland is the only country in the world that has bad drivers? Most people negotiate roundabouts without issue. Id imagine most other roadwatchers here will favour the roundabouts - remember subject title - urban roads (so freeflow in this case is assumed not an option). Id even allow this if the lights only changed by request - some traffic lights let pedestrians go without pressing button - such a joke. Pedestrians should not be given priority - the roads are paid for by car owners. More roundabouts please!!Īs per the recent replies by ATC on the proposals on alternatives to traffic lights at N6 J9, it seems like the lights are favoured to be more pedestrian friendly. Installing traffic lights like its going out of fashion. Should shut them off outside of peak hours thoughģ) Newbridge in general. Browne roundabout can be busy so the lights are probably right there. All roundabouts which could likely be improved with freeflow, but in lieu of that it beats the crap out of traffic lights. Usually when going into town from Monksland, i take bypass to N55 exit and straight on, but this almost makes it worth using the old road in through the medieval town bridge.Ģ) Approach roads to Galway junctions (M6 to Headford Rd/Browne Roundabout). People (clearly p1ssed off with the junction) started using Mels Terrace as rat run, which was then closed. Junction changed to traffic light with traffic islands when shopping centre opened. Formerly a roundabout that flowed quite well (save the buses going around it). Personally, i think that if space is not an issue, roundabouts (even mini ones) should be placed at every current traffic light junction.ġ) Athlone Crescent Junction. Just wanting to see others take on these.
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