The distance on the road that you must be able to see to pass safely depends upon the speed limit on that section of the road and the speed of the vehicle to be passed.
about 17,500 miles per hour to pass through the atmosphere safely
100 feet
1600 ft.
200 miles
The distance from Austin to Eagle Pass is approximately 240 miles.
506 miles
190 miles
557 miles
about 300 miles
About 250 miles.
3 seconds
The distance between Portland OR and Grants Pass OR is about 246 road miles.