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I'm not completely sure but 44 lbs. sounds like a little too much pressure. Check the sticker on the driver-side door jam and it'll tell you what they should be.
30 PSI is what the mfr. recommends. As stated above, it's written right on your door jamb. No one mentioned that this is the pressure when COLD and should be adjusted accordingly with the seasonal temperature changes. Your operating temperature will then be a few pounds higher. The 44 is the max pressure recommended by the tire mfr. and under highway conditions would be too high once they are warmed up.
It's ok the put a few extra pounds for a highway trip and help reduce fuel consumption as well as cover yourself for the wide variations in temps on trips. Have a nice trip.