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Onramp lights on N4 Chapelizod Bypass

  • 20-11-2016 7:46pm
    Registered Users Posts: 7,070 ✭✭✭

    There have been works on the chapelizod bypass underway the past month. There are new traffic lights on the onramp from the Kylemore Rd. I wonder what they will be for? Is it to control traffic entering the bypass?


  • Moderators, Business & Finance Moderators, Motoring & Transport Moderators, Society & Culture Moderators Posts: 66,471 Mod ✭✭✭✭L1011

    Ramp metering, I'd imagine. Its already (rarely) used at the port tunnel / M1 / Coolock Lane interchange. Basically by allowing traffic through in smaller amounts (as low as one car at a time) it can merge with the mainline without the mainline coming to a halt as currently happens.

    Its used extremely frequently elsewhere, particularly in the US.

  • Moderators, Music Moderators Posts: 2,147 Mod ✭✭✭✭Oink

    Does anybody know when those [...] traffic lights will be activated? looks like the new bus lane has been ready to go for 3 months now. It boggles the mind to put it politely.
    Any info appreciated. Cheers.