I actually found the sign on Google Maps.

If you follow 29N, right before Exit 20, you can see the sign from the June 2019 images, but as you progress on the off-ramp, you can see in the Sept. 2022 image the sign is on the ground.

I called the MDOT SHA number I mentioned below, was transferred to the division that handles Howard County. The person I spoke with was very pleasant and I mentioned the downed sign. They'll look into getting the issue addressed.

Lets see how long before it's back up. It's hard to say if it's a redundant sign, as a few hundred feet down the ramp there's another sign, but the downed one included the blue informational signs that the other doesn't have.