NUMBERS AND NAMES OF HIGHWAYS. 3 ATLANTIC HIGHWAY. 4 ATLANTIC-PACIFIC HIGHWAY. 8 COLORADO TO GULF HIGHWAY. 15 GLACIER TO GULF MOTORWAY. 16 GLACIER TRAIL. 18 JEFFERSON HIGHWAY 19 JEFFERSON DAVIS NATIONAL HIGHWAY 22 LEE HIGHWAY 24 LONE STAR ROUTE. 26 MISSISSIPPI RIVER SCENIC HIGHWAY 28 NATIONAL OLD TRAILS ROAD. 37 SOUTHWEST TRAIL. 43 APPALACHIAN SCENIC HIGHWAY 45 DETROIT-ASHEV/LLE-MIAMI HIGHWAY 46 FLORIDA SHORT ROUTE 48 INTERNATIONAL PEACE HIGHWAY 49 ITASCA PARK HIGHWAY 50 JEEP DAVIS HIGHWAY 51 LAKES TO FLORIDA HIGHWAY S3 MISSISSIPPI GULF COAST TO CHICAGO HIGHWAY 57 SOUTH ATLANTIC COASTAL HIGHWAY 59 DANIEL BOONE TRAIL. SAN DIEGO TO SAVANNAH 2535 MILES SAN DIEGO TO ST. AUGUSTINE &80& MILES >7,ry A LESAR NAXJpNAL HIGHWAYS