[Gronk!]

I think 16X was the old name of the highway when it was first built.

16X was indeed the name of the highway several decades ago, but has been Highway 16 since then.
Same deal with Secondary Highway 794 to Westlock before it was upgraded to Highway 44.

It's now the 21st century. The Parkland County transportation officials should cease this despicable delusion that they are still living in the 1980s.

 

[The_Cat]

Or is it Alberta Transportation’s responsibility?

 

[Habibfazil]

Or is it Alberta Transportation’s responsibility?

probably, when did they change names, I haven't heard 16x in eons...

 

[MuzikMachine]

probably, when did they change names, I haven't heard 16x in eons...

The change was made in 1997. When it was made, the signs were patched over the 16 & 16A respectively, it looks like on fell off. You can also see that when signage changed from Yellowhead 16 to TCH 16, Alberta Transportation patched over the signs, as evidenced by the large white outline on some the older freeway signage like at Hwy 22 at Entwistle.