Hello, I apologize if this topic has been covered but I searched and didn't find what I was looking for. Anyway, I'm in the final stages of planning my trip and I was wondering which way you guys would recommend taking to get to Petrified Forest NP from Tucson. It seems like the shortest way (at least via Mapquest) is on various state highways - 77 and 60. I wonder if taking the interstates (I-17 & I-40) might not be easier? I know, at least where I live, sometimes state highways are really slow to travel on because there are stoplights or only one lane. I guess I'd just like to know what sorts of differences there are between the two routes - time/terrain/convenience-wise - and which one you prefer. Thanks!