There are tons of I-86 markers along intersecting routes north of Middletown. What looks to be a backwards interstate sign is mounted over them. I've often wondered if those are true blanks, or if there's a number on the other side -- and if so, what that number is.
It seems to me that it would take just as much effort to go and remove the bolted-on covers as it would to install new I-86 signage, and the existing signage may have deteriorated or become damaged during the time it was covered. So I wonder why they just didn't leave a blank space on the posts and install the I-86 signage later.
When the new section of US 219 opened north of Elkins, blank posts were placed in spots for the US 48 signage that was installed years later. But they did not leave space on the overheads where 219 departs the Corridor H expressway, so they had to move the existing route markers (thank goodness for demountable copy) to make room for US 48 -- or in some cases, just mount the US 48 signage independently on the gantry supports.