Never been to Arizona myself but Route 89 has a genuinely strange history, there are so many accounts from that stretch near the San Francisco Peaks specifically. The elevation and the remoteness of it probably plays into why people are more susceptible to noticing something off.
What I really want to know is whether anyone experienced any audio anomalies beforehand. In my EVP work I've noticed that time displacement events - or whatever we want to call them - are sometimes preceded by a kind of static or low hum that witnesses only remember after the fact. The brain suppresses it in the moment.
If you lost time on that route last summer, what was the last thing you clearly remember before the gap? Was it daylight still? And did you notice anything wrong with your vehicle afterwards, electronics playing up, battery drained, that sort of thing.
The Men in Black angle interests me too because theres been at least two reports I've read of black vehicles tailing people on that exact corridor after similar incidents. Please do share more details if you have them.