Late 1950s under president Eisenhower. The full name of the system is "The National Defense and Interstate Highway System".
Dwight Eisenhower
Signage is the only reliable way to tell. State highways will have a state highway sign (what that looks like varies from state to state), while interstate highways will have the blue and red interstate shield.
your heart
President Dwight Eisenhower
The major highways are highway 50 highway 99 and highway 101 As well as Interstate 5, Interstate 40, Interstate 15, Interstate 8, and Interstate 80.
it is an interstate
The best way to travel from Nashville Tennessee to Knoxville Tennessee is by Interstate 40.
Interstate Highway 80.
Alaska does not have an interstate highway as an interstate highway requires 4 lane divided road connected at the very minimum state. Alaska is separated from the 48 other states. Thus can not have an interstate highway. Alaska has state highways and it has national scenic routes but are not able to have an interstate highway.
The US Interstate Highway that runs through Helena, Montana is Interstate 15.
Interstate 40, Interstate 75, Interstate 65, Interstate 81, Interstate 55...
Interstate 64 and Interstate 77.
interstate
Interstate 10
* Interstate 10 * Interstate 17 * Interstate 40
The US Interstate highway which connects Kalamazoo, MI to Stevensville, MI is Interstate 94.