Further info may be available
here.
From discussions I've seen/heard elsewhere, it appears that the majority of locals that have expressed an interest are opposed to the scheme in its detail (but I guess agree that traffic can be a problem in nw). The feeling is that the leaders are after some kind of big-time green finding for prestege.
I get the impression that Llanberis and Betws would be gateway towns (and perhaps parking restricted even along the oggy valley laybys/verges). The money-making plan also seems to try 'encouraging' people to spend more money locally, i.e. 'honey-pot'. e.g. (more rumour from elsewhere) the parking charges would be high, but semi-refundable in local shops.