Every day, I run across some sign that is toasted/faded/unreadable and I'll pop in to suggest an upgrade!
I'll get a job about 25% of the time when I ask, and the other 75% the owners are OK with decrepit old signage.
As for this particular (potential) work, I guarantee it's a huge PITA to obtain authorization to remove&replace these letters.
It normally involves a bidding process with the Government, as they need to get three price bids through their online RFP system.
https://procurement.maryland.gov