Interstate migratIon is an interesting element in American national life.
I'll bet it's close to Interstate 70.
Most of the route was via Interstate roads and easy driving.
In 1895 the 6% external debt was converted into a 5% debt, the bonds of which remained at a premium for 1902; in 1896 the alcabalas or interstate customs and municipal octrois were abolished, and replaced in part by direct taxation and increased stamp duties.
They are located near the interstate, for convenience.