70
If you take I-95, then Florence, SC is almost exactly half way.
(95 + 99)/2 = 97
75
Your halfway point is Smithfield, NC, along I-95.
The intersection of I-95 and I-26 is roughly the halfway point of that trip.
Travelling down Interstate 95 the halfway point would be the Jacksonville Florida area.
Fredericksburg, VA
It is (6.5 + 12.5)/2 = 9.5
There are 9 fives between 95 and 50. To arrive at this answer we figure the difference between 95 and 50 which is 45. We then divide that total (45) by 5, which equals 9.
The intersection of I-95 and I-26 is about halfway.
The halfway point between District of Columbia (DC) and High Point, North Carolina is Rawlings, Virginia on I-95.
It is 90, the value halfway between the two middle values.