Mostly this makes for some interesting traffic calming. Because the two directions of traffic are forced to take turns, you get lots of quiet time cycling followed by bursts of cars. Its good. But is it safe? Not here.
Here's the problem. When heading towards St Andrews, your way is blocked, by a big green barrier. The barrier shows that you have the right of way over oncoming vehicles. Which means it is OK to pull out; they will give way.
But look on the other side. There's no sign saying oncoming vehicles have right of way. All you get is a keep left sign, which means "keep to your side of the road". Which implies you have right of way unless otherwise stated.
This is a mess. If there was a contact number painted up I'd have photoed it and complained.
As it is, all I could do was move the barriers enough to create a bike lane, so when going towards St Andrews it was slightly safer. It's still pretty dodgy cycling in the other direction though.