| . | Storm King Highway | Frontispiece |
| | A Great Engineering Project Along the Hudson between Cornwall and West Point, N. Y. | |
| PAGE |
| 2. | The Appian Way | | 22 |
| | Showing the original Paving Stones laid 300 B.C. | |
| 3. | Map of Italy | | 24 |
| | Showing Some of the Twenty or More Roads that Radiated from Rome. | |
| 4. | Map of Roman Roads in England | | 26 |
| | (After Jackman: “Development of Transportation in Modern England.”) | |
| 5. | Map of the North-Eastern Portion of the United States | | 36 |
| | Showing the Location of Well-known Portages. There Were Other Portages Wherever Two Water Courses Came Near to Each Other. (See Farrand: “American Nation,” Vol. I, and Thwaites, Ib. Vol. VII.) | |
| 6. | Map | | 42 |
| | Showing Main Highways and Waterways in the United States about 1830. When the Railroads Entered the Industrial Arena, the Country Was Being Covered With a Net Work of Highways. (Based on Tanner’s Map of 1825 and Turner in “American Nation,” Vol. XIV.) | |
| 7. | Map | | 54 |
| | Showing Transcontinental Trails in the United States. | |
| 8. | Way Bill | | 66 |
| | Used on the Slaymaker Stage Line from Lancaster to Philadelphia, 1815. (Courtesy of Prof. P. K. Slaymaker, Lincoln, Nebr.) | |
| 9. | The Sault Ste. Marie Canal | | 76 |
| 10. | The Evolution of the Railway Train | | 102 |
| | 1. The First Railway Coach—1825.2. Horse Power Locomotive—1829-30.3. Stourbridge Lion—1829.4. Stevenson’s Rocket Locomotive—1829.5. The DeWitt Clinton Locomotive—1831.(From Brown’s “First Locomotive”—Courtesy of D. Appleton & Company.) | |
| 11. | Modern Locomotives | | 120 |
| | 1. Showing the Growth in the Size of Locomotives During the Past Twenty Years. The Smaller Locomotive is an American Type Class Engine of 1900. The Larger is a Mountain Type Engine. Both are Used on the C. B. & Q. R. R. Photographed at Lincoln, Nebr., Sept., 1922.2. One of the New Gearless Electric Locomotives Built by the General Electric Company for the C. M. & St. Paul R. R. | |
| 12. | Transportation Across Death Valley | | 126 |
| | A Picturesque Method of Earlier Days. | |
| 13. | Good Roads Day in Jackson County, Mo. | | 132 |
| 14. | Chart of the Organization of the U. S. Bureau of Public Roads and Rural Engineering, 1917 | | 142 |
| 15. | Hard Surface Highway in Oregon | | 146 |
| 16. | A Farmer’s Wife Meeting the Postal Truck | | 146 |
| 17. | Trackless Trolley Operated on Staten Island, N. Y. | | 166 |
| 18. | Motor or Rail-Car | | 166 |
| | Showing the Gasoline Locomotive and Trailer, Operated by the Chicago & Great Western R. R. | |
| 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 |
