I've made that trip a few times, and I'd say that the halfway point is someplace between Cincinnati OH and Louisville KY. I know that's not exact, but that's where I'd look for a place to stay for the night. It's a long haul, so look for 18-20 hr of solid driving
The halfway point between Dallas, Texas and Warren, Ohio is in Centerville, Tennessee.
A rough estimate would be Amarillo, Texas.
The driving distance from Dallas, Texas to Rochester, New York is 1,435 miles / 2309 km
TENNESEE
denver Colorado
Panama city,fl
Four Corners, USA
Centerville, tx is roughly the half way point.
The halfway point between Phoenix, Arizona and Dallas, Texas is Eagle Flat, Texas.
The town between Longview and Dallas on I-20 is Canton. It's in Texas.
hwy 71 and I10 west is a good halfway point, if you are traveling I10. Going 290, it would be where the Interstate makes a 90 degree turn (Im not sure of the town).
Hewitt, Texas