There's talk in T.A. Land about the Pulaski Bridge.
I propose the following:
A strong argument can and should be made to change one lane of
southbound car traffic into a bike lane. It could be done with the
simple installation of Jersey barriers.
All the roads heading in the bridge are two lanes... and the bridge itself ends as two lanes. There is simply no need (except perhaps to let cars hit 100 MPH) for the bridge to have three lanes when it serves a road with two. It is all visible on google earth.
I'm no traffic engineer, but I'm pretty certain it is more dangerous to encourage speeding and then merging than to simply have two constantly moving lanes of traffic the whole way.
Regarding the "walk you bike" sign... Can anybody dig up the exact policy? Sometimes these "policies" take on a life of their own. It is possible that the "policy," if it exists, can be met by simply placing a sign at the joints of the bridges saying "walk your bike over joint" rather than implying that the whole bridge is no biking.
But if effort is spent, I think more serious effort should be spent trying to claim a non-needed car lane as a bike lane. As it is, the current sidewalk is too narrow while being heavily used by both bikes and pedestrians.