So you can reduce traffic in a road by making it an LTN. But what about the other roads that have to soak up additional traffic which is trying to complete it's journey and cannot proceed through the LTNs - they see an increase (in some cases, substantial) in traffic. I'm not talking main arteries, they are chocka - it's other minor road routes that the displaced traffic now uses to try and make some progress. Weird logic and weird in actual practice. It's like sh*tting in someone else's backyard and proclaiming how clean your yard is now that you've built a fence around it, or, more accurately, throwing the sh*t into another neighbourhood and proclaiming how improved all the measurements you're making in your area are now. - "yeah the air's clean here, see it worked..". It feels like a small number of people felt they just had to take SOME kind of policy decision (and were obliged to some privileged people).