Our soft-laminated map USA Interstate includes:USA West 1:4 000 000, USA East 1:4 000 000, Puerto Rico 1:4 000 000, Hawaiian Islands 1:4 000 000, Alaska 1:8 000 000, USA administrative / time zones; interesting statistics: conversion chart for temperatures, weights and measures; climate charts New York / Los Angeles with temperatures, sunshine hours, precipitation and humidity; sights and much more."Get your motor running, head out on the highway"! The Interstate highway system - officially the Dwight D. Eisenhower National System of Interstate and Defense Highways - authorized by the Federal Aid Highway Act of 1956 and supported by former US President Eisenhower who had been impressed by the German Autobahn system - is a network of roadways interconnecting the nation. It was originally intended as part of a national defense system by which goods and arms could be transported cross-country in case of a national emergency. Today the nearly 47 thousand miles (75+ thousand kilometers) of road network are mostly used by vacationers, tourists and commuters. Nowadays it would be unthinkable to get by without the Interstate. From shore to shore, from border to border - connecting the country.