My transportation advisor has told me that the 4th Street bridge is over capacity. The 4th Street bridge has been there since the beginning (which wasn't that long ago), serving the central part of town. I guess it's time to build a new bridge.
The 4th Street Bridge is not that big, averaging around 560 cars and 30 passengers a day, which can pile up.
Plans are now going on in city council to build a new bridge. Stay tuned.