Finally got back to the bridge to snap a couple of pics. The joint is similar to the one in the pic provided by alpha, but not the same.


As you can see, some of the joints are wide enough to let a wheel slip in. And the angle of the teeth is pretty steep, nearly parallel to the line of traffic flow.
I used the technique recommended by the LBS guy today to cross 5 of the joints, with no problems. Hit the joint directly perpendicular, with some speed, and don't worry about them. So far, so good. I'm sure a bunny hop would work, but I'm not too skilled at the hop and would likely mess it up and land in a slot. My rear tire pressure was probably around 100. Could be higher, and I am running between 105 and 110 with the new Conti tires. But if a wheel drops in to the depth shown in the above photo, I'm not sure higher pressure would be enough.
Thanks for all the input.