We have a handful of toll roads over this end of the pond. One is heavily used, having cost 100's of millions of dollars to build, and the toll doesn't cover cost of the administration or the build cost, and is a laughing stock basically and isn't well organised. It's works via automatic payment, toll booth (which is often down) or via phone. The only upside is it's bypassed a dangerous bit of road that's very extremely steep, keeping the very heavy vehicles off most of the time as they now have the alternate route.
One other is a total joke due to the lack of use. It connects two cities, and is only about $1 each way, but cuts off a big distance, but people don't use it much.
Have used both, mainly due to it saves time. But like most if the tolling gets to expensive people will revert to using the other routes.
We have one other new bit of motorway, before it officially opened the powers that be were talking about $8 each way to use, everyone really jumped up and down and it's free to use. To put this all into perspective, more than 50% of the price of petrol here is tax and the price of vehicle registration has increased dramatically in the last two years.
Always interested in what happens over there, as they model things here using what's happening in larger populations. Usually the most wasteful and unnecessary and proven not to work will be a go. Does that sound familiar?!