Depends. Urban expressways I'll usually go the speed limit. Rural expressways I'll go anywhere from 8 mph under to 4 mph over. Rural interstates here have a speed limit of 70 mph. But for fuel economy reasons, I try to go only 100 km/h. (Roughly 62 mph, and I choose that because it usually keeps me from being the same speed as other slower drivers.) However, if I'm running short on time because I got delayed either before setting out or while driving, I'm willing to go 120 km/h on the rural interstates. That ability to still make it someplace on time when delayed is another reason for planning on 100 km/h.
Not really. I'm at the slow end of the bell curve of drivers here, but I'm not well below it and I do regularly pass drivers doing only 60 mph. The speed limits on the interstates here are by and large the maximum safe speeds anyway. (There is a curve on I-26 at it's junction with I-20 and I-126 that does have regular accidents because of out-of-state drivers who aren't aware of that fact.) Plus, I'm not an
Italian race car driver and I rarely drive late at night, so I'm not a candidate for being rear ended.
Also, keep in mind that South Carolina was not laid out on the square township system common to most of the US west of the Appalachians. Long straight flat stretches of road are simply not to be found.
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