September 4
| 1925 | President Thomas P. Henry and writer Ernest N. Smith drive their Cadillac into Oakland, CA, after a cross-country trip that began at the Zero Milestone in Washington, DC, on August 30. After breakfast, they drive to Sacramento to present a letter from President Calvin Coolidge to Governor F. W. Richardson. Henry and Smith also carry letters of greeting from Secretary of Commerce Herbert Hoover, Secretary of War General J. H. Hines, and Secretary of Agriculture William M. Jardine, who tells Chairman Harvey M. Toy of the California Highway Commission that, "In expressing these greetings to you on this occasion, it is with the wish that the contacts between the California Highway Department and the other highway organizations of the West Coast and . . . the Bureau of Public Roads will be as cordial and profitable in the future as I have found from my western trip this summer they have been in the past." |
| 1959 | Members of the Blatnik Committee, chaired by Representative John A. Blatnik, are selected "to obtain solid facts about every phase of the Federal Highway program and after preliminary investigation hold open hearings" regarding allegations of fraud and corruption in the development of the Interstate Highway Program. |
| 1968 | FHWA announces publication of the Handbook of Highway Safety Design and Operating Practices. It presents the latest safety techniques for bridge design, signing, barriers and guardrail, drainage, and railroad crossings. |
