I was wondering, does anyone have a list of highways in Arizona that still have emergency call boxes installed? I know I-19 and US 93 are two that do. I think ADOT policy is to retain them on major rural highways with poor mobile coverage.
Interestingly, the signage for those on I-19 have the phone symbol on them, while those on US 93 have the words "CALL BOX". This makes me wonder if those on I-19 support emergency voice calls while those on US 93 only have the buttons to notify a specific emergency service.
I know there's a random one on AZ 89 a few miles south of Ash Fork, and one down on AZ 69 between Dewey and Cordes Junction.