During the afore-mentioned walking tour my group hiked across the bridge. Narrow sidewalks and no curb cuts. The only way I would ride across would be to wait for a "fresh" traffic light to halt the platoons, and take the lane, which is too narrow to allow passing.
My tour included a traffic engineer, who pointed out the condition of the fencing. We discussed closing the ramps, which really aren't needed due to the number of other DT interchanges.
I think that's MDOT's next target, is 131 near Wealthy and the overpass. It's in bad shape and needs to be replaced. MDOT is starting the process of redesigning the bridge and on/off ramps. That's why this discussion of at-grade vs burial vs removal has started.
That bridge is horrible on a bike. The curbs are way too high and I've actually scraped my pedals on the sidewalk. And you can feel the entire bridge sway when trucks go over it. And yes, I've watched many a semi get wedged between the walls trying to make the turns.
First, all bridges "sway' to a certain extent. I would describe it more as a "bounce" when heavy trucks go over them. They all do it, it's normal.
Wealthy Street is not an ideal exit / entrance but you need to keep this in mind. The ADT on US 131 in the late 50's was about 10% of what it is today. The trucks of that era had 32 foot trailers, a 40 foot trailer was rare as they were just coming into existance. Today's 53 foot trailers were not even thought of. The ramps certainly don't meet today's standards but they did in the 50's
Underneath 131 and Wealthy was all railroad tracks and the northbound ramps were on the left side to accomodate the "downtown" ramp on the right side that went to Fulton St.
Closing the NB exit ramp is not really a viable option. Wealthy Street is vital for NB trucks to Market or Wealthy west of Market - the industrial area west of the river. Franklin Street doesn't work well, no good route to Market. There's no NB exit at Market Street anymore.
I'm afaid MDOT is only going be be able to put a "bandaid": on it in the form of a modified SPUI or a diverging diamond. The Rapid, the new Amtrak station, the new Market and the park have the interchange pretty well constrained to improvement only in the existing foot print.