Originally Posted by Anders Green
How long you wait is all about strategy and making a smart plan. Lots of unusual things can come up.
Yeah, what Anders said.
Or if you are entering a section with possibly tricky navigation and you know someone near you is using GPS (you on roadbook or nothing like some do) then you can try to enter directly after and sponge off that person or if you want to avoid someone following you you can possibly make that happen.
OR, if you have what you think is a perfect plan to stop at a certain Pemex in Felipe (the one leaving town, but who would do that?) and that station happens to be closed and you have to double back to another station and it costs you just enough time to be, say, 2 minutes late to the start of the next Special maybe that was a piss poor plan...