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.
A lack of interstate cumity, and double taxation of certain classes of property, have also offered difficulties.
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.