Is shield generation for US highways automatic at this point? Is it working well? Is it instant?
Interesting to note: Interstate shields and US highway shields are matched differently. If memory serves, Interstate shields will be given to anything that starts with I-###, no matter what's at the end, whereas US highway shields are granted strictly – only to US-###, apparently, not even US-### N/S/E/W. So, assuming everything works correctly, "(Construction Zone)" on an Interstate will never be seen, whereas a US highway's shield will be broken by the phrase.