19. THE EVOLUTION OF THE STEAM AUTOMOBILE 182 1. The Cugnot Steam Carriage--1770. 2. The Trevithick & Vivian Steam Carriage--1801. 3. The Gurney Steam Carriage--1827. 4. The Church Automobile Carriage (Steam)--1833. 5. Gaillardit’s Steam Carriage--1894. (Courtesy of the _Scientific American_.) 20. A MODERN RURAL PASSENGER BUS 184 21. A NEW YORK CITY “STEPLESS” BUS 184 It Has an Emergency Door, with Wire Window Guards, and will Seat 30 Persons. 22. THE EVOLUTION OF THE GASOLINE MOTOR CAR 188 1. Panhard & Levassor Carriage--1895. 2. Duryea Motor Wagon--1895. 3. The Benz Motocycle. 4. Hertel’s Gasoline Carriage--1896. 5. The Olds Horseless Carriage. 6. Winton’s Racing Machine. (Courtesy of the _Scientific American_.) 23. HAULING BEANS BY MOTOR TRUCK AND TRAILER 200 Sacramento Valley, Calif. 24. HAULING SUGAR BEETS TO MARKET IN A MOTOR TRUCK 200 25. TRAFFIC ON FIFTH AVENUE, NEW YORK CITY 234 26. GIVING A MACADAM ROAD AN APPLICATION OF TARVIA BINDER 254 This is Followed by a Coat of Screenings and then the Road is Rolled Again. 27. A ROAD OF MIXED ASPHALT AND CONCRETE BEING TESTED OUT 254 28. CROWNING A DIRT ROAD IN CALIFORNIA WITH TRACTOR DRAWN GRADER 263 29. A MILK TRUCK EQUIPPED WITH BOTH CANS AND TANK 296 30. A LUMBER LOG TRUCK USED IN THE NORTHWEST 296 31. A NATIONAL HIGHWAY IN THE MOUNTAINS OF MARYLAND 332 32. A DANGEROUS CURVE MADE SAFE BY AN ARTISTIC CONCRETE WALL 364 The Tennessee State Highway at Lookout Mountain, Built of Cemented Concrete. 33. PIN OAK STREET TREES 388 About 15 Years Old on Land that Was Once Considered to be a part of the “Great American Desert.” 34. A COTTONWOOD WIND BREAK 388 Formerly very Common in the Prairie Region. 35. WARNING AND DIRECTION SIGNS USED IN THE STATE OF ILLINOIS 434 36. TRAFFIC GUIDES 442 (From Eno’s “The Science of Highway Traffic Regulation.”) 37. NEW YORK CITY TRAFFIC GUIDES 444 “In November, 1903, one hundred blue and white enameled signs, directing slow-moving vehicles to keep near the right-hand curb, were put in use in New York. These were probably the first traffic regulation signs ever used.” (From Eno’s “The Science of Highway Traffic Regulation.”) 38. TRAFFIC TOWER ON FIFTH AVENUE, NEW YORK CITY 446 39. CAMPING GROUND AND CARAVAN 458 40. A GIPSYING TOURING CARAVAN 458 HIGHWAYS AND HIGHWAY TRANSPORTATION CHAPTER I