Here's a good film from Streetfilms about the cycle paths in Boulder, but the thing is, it looks as though something is fishy in the film to me.
So many users using the paths in perfect order. Roadies, mountain, cruisers, recumbents all riding at the same speed along with kids, skateboarders and pedestrians, all never getting in the way of each other despite some of the most crowded pavement seen.
It all seems a little too idyllic somehow.
I've been riding a separated MUP this fall and I just wish I saw a fraction of this harmony on my MUP that I've been riding. People always get in the way of others. I run a higher risk of collision on my paths than I do when I ride the roads. After ringing my bell well in advance of approaching and having a powerful light preceding my arrival, the person will as likely move to the left or right or not move at all. I've had numerous close calls with at least half the users.
Maybe this behavior's a Boulder thing? Or maybe the film has a bit of production value going on.