[Superman]

The first of these to be built in Washington State was completed recently quite close to my house. It is indeed far more efficient than an ordinary freeway overpass. And while humans are thorough in proving that nothing can be made foolproof, it would be very difficult for someone to go the wrong way in a lane on that bridge. Substantial concrete barriers make that nearly impossible,

As I say, it is a very efficient bridge. There are only two light "modes" and when a mode is "on," the traffic with the green lights can enter and exit the bridge all at once regardless of whether they are getting on the bridge, getting off the bridge, or turning left to enter the freeway. In other words, wait times are quite short, you will see a maximum of ONE red light during the experience, and whatever backed up line of traffic is with you when the light turns green will be emptied before the light turns red again.