Pretty easy answer to that question: LaDOTD is doing some things on the cheap, like that US-11 exit sign. That's just a face-palm of a sign. They might as well have just used a US-11 shield, an arrow and nothing when using a sign panel that small.
Meanwhile here in Oklahoma both OTA and ODOT have ditched Clearview, but they're still goofing up sign layouts, not following MUTCD specs correctly, much less even matching up sign legends with green panel sizes and shapes to hold the message properly. That helps prove a point I've made previously that the type family utilized on a sign layout has very little to do with someone composing a traffic sign design correctly. Now we have a growing collection of face-palm layouts set in both Series Gothic and Clearview.
The FHWA needs to delete the verbiage from the MUTCD about sign fonts featuring lowercase characters with an x-height at least 75% the size of cap letter M-height. Last time I looked the MUTCD didn't feature that critical "at least" part in the verbiage. Too many people creating traffic signs here in Oklahoma totally misunderstand the specification. They scale the lowercase letters down to 75% of their original size. The end result is stuff like this example at Exit 1 of I-44:
https://goo.gl/8Wtnhy. Great big capital letters and really tiny lowercase characters. Most of the new neighborhood street name signs in Lawton have the same problem.