I think you'll find the changes to LRT services that came into force at the start of last month did just that, but without painting them green.This is an excellent point, Edinburgh has a great bus service, more limited stop buses (maybe paint them green) is a a more cost effective solution.
On a related transportation issue at the same time the times the bus lanes are in force changed. I think they're all now only peak times.
Does this mean the anti car council have finally admitted they originally got it wrong? I wonder when they'll apologise to the 100s of thousands inconvenienced by years of intransigence.