It is an interstate highway so any doubt that the federal government was / is not going to pay90+% of the cost was / is a forgone conclusion.
The rest of the problem is that local, intra-Maryland, commuter traffic either has to go out its way some distance or takes longer because of increased traffic congestion. Lots of places pleading for federal upgrades of such nuisances. Took about 30 years for the Feds to get around to upgrading my community's biggest such from when I saw the need. And it both crossed state lines and had higher traffic volume than had the Key bridge. Let MD go through routine competition vs. other griping states for Federal funding. If they want faster results, spend their own, or insurance money.