Another of Mark Wagenbuur's videos showing cycling in the Netherlands. An older junction from the 1960s in Utrecht and a newer one in Houten. Look at the ease of use with the newer situation. No traffic lights for cyclists at all, and a quicker journey as a result.
Tunnels are not, of course, the right solution in all locations. Also see an even larger traffic light junction in Groningen which gets rid of the conflict points and allows crossing, and even making a left turn, in one movement.