here is a pdf source http://www.countyengineers.org/Template.cfm?Section=Publications&template=/ContentManagement/ContentDisplay.cfm&ContentID=27230
The distance is 745 road miles from the CA state line to the TX state line.
About 2,240 road miles.
The distance is about 1,821 road miles from one state line to the other.
The distance between Connecticut's state line and South Carolina's state line is about 635 road miles.
The state of Montana has a combined total of 69,567 miles of road. This includes roads, streets and both national and state highways.
Approximately 2,290 road miles.
The distance is 1,031 road miles from the Louisiana state line to Harrisburg.
The driving distance from Clio, Michigan to the PA state line is about 300 road miles.
The driving distance from the southern state line of Kentucky to Savannah GA is 470 road miles.
The approximate distance by road from the Utah state line to the Michigan state line is 1,320 miles.
The distance between Charlotte NC and the New York state line is about 641 road miles.
The distance between Indiana's state line and Columbus OH is about 119 road miles.