In August, 1933, the final paving project on US-66(Rt.66) was finished, completing the paving of the historic highway across the entire State on a diagonal course from the Kansas to the Texas State line.
In August 1939, the first Statewide Traffic Volume Map was prepared from data gather by the Planning Survey team in 1936.
On August 1, 1915, the second Highway Commissioner, George Noble, began his term. He served until May 30, 1919.
On August, 1, 1929, the State Highway Commissions of both Oklahoma and Texas met in Austin, TX and agreed to build three bridges across the Red River on U S-81, US-77 and US-75.
On August 1, 1936, the first inventory of all roads in Garfield County was completed and work began on the first Garfield County general highway and transportation map.
On August 2, 1932, the project to construct the US-66 Bridgeport Bridge was awarded. At the time of its completion the nearly 4,000 ft. long bridge was the longest bridge in the Southwest U.S.
On August 3, 1936, the first inventory of all roads in Cotton County was completed and work began to prepare the first Cotton County Highway and Transportation Map.
On August 3, 1953, the Highway Commission, upon the request of the U.S. Bureau of Public Roads, designated US 66 from El Reno west to the Texas State line.
On August 4, 1975, the project to construct the I-44 Belle Isle Bridges between US-66 and Classen Blvd. in Oklahoma City was awarded.
On August 5, 1985, the current Department of Transportation Building (built in 1974) was named the R. A. “Dick” Ward Transportation building.
On August 6, 1936, the first inventory of all roads in Bryan and Coal Counties was completed and preparation began on the first county transportation maps.
On August 6, 1951, the Highway Commission approved the designation of SH-77 Scenic from east of Marietta to SH-77A at Lake Murray.
On August 6, 2001, the Transportation Commission approved Gary Ridley as the 16th Director of the Transportation Department (formerly the Highway Department).
On August 7, 1961, the Highway Commission approved a Oklahoma Turnpike Authority resolution for a new turnpike route, the Southwestern Turnpike, later named the H.E. Bailey Turnpike.
On August 8, 1936, the first inventory of all roads in Harmon County was completed and work began on the first Harmon County General Highway and Transportation Map.
On August 8, 1951, a project to surface the US-66 Bypass between Classen Blvd. and May Ave. in Oklahoma City was awarded by the Highway Commission.
On August 8, 1978, the project to construct the new US-75 bridge over Canadian River north of Calvin was completed. It replaced the bridge that collapsed in May 28, 1976.
On August 8, 1978, the Transportation Commission approved its State Rail Plan, allowing Oklahoma to be eligible for federal assistance under the Railroad Revitalization and Regulatory Reform Act of 1976.
On August 9, 1971, the Transportation Commission began discussing the need for improvements to I-35 from I-40 south through Norman because of growing traffic needs.
On August 10, 1970, the Transportation Commission awarded the I-244 improvement project from Knight St. to 24th St. in Tulsa.
On August 12, 1946, the US-59 Honey Creek Bridge over Grand Lake was dedicated south of Grove.
On August 13, 1936, the first inventory of all roads in Johnston County was completed and work began to prepare the first Johnston County highway and transportation map.
On August 13, 1956 the Highway Commission approved the designation of SH-39 Business on 5th Street, Cherokee and Main Street in Asher.
On August 13, 1956, the Highway Commission adopted a policy that on interstate projects 90% of costs for purchasing of right-of-way and adjusting utilities will come from Federal Funds and the remaining 10% will be furnished by the State of City.
On August 14, 2001, a 6.6-mile test section of Brifen Cable Barrier System, the first of its kind in the U.S., was completed on the Lake Hefner Parkway(SH-74).
On August 15, 1915, the Highway Department officially set-up offices in the Mercantile Building in Oklahoma City. Because no funding was dedicated, all office furniture and supplies were borrowed from other State Agencies.
On August 15, 1959, the National Interstate and Defense Highways Numbering System was adopted in Oklahoma. East-west highways were assigned even numbers, increasing from south to north; and north-south highways were assigned odd numbers, increase from west to east.
On August 16, 1964, a project to construct a 6 mile section of I-40 west of SH-99 in Seminole County was completed.
On August 17, 1936, the first inventories of all roads in Custer, Garvin and McCurtain Counties were completed and work began on preparing the first comprehensive county transportation maps.
On August 18, 1936, the Highway Commission approved the designation of SH-71 from Bennington in Bryan County south to the Texas State Line.
On August 19, 1958, the Highway Commission awarded contracts for three projects to construct sections of I-35 in parts of Cleveland, Oklahoma, Noble and Payne Counties.
On August 19, 1976, the project to construct the SH-33 bridge over the Cimarron River east of Perkins was completed in Payne County.
On August 20, 1957, the Highway Commission awarded a 3-mile project to construct a section of the US-77 East Bypass near NE 20th St. in Oklahoma City.
On August 20, 1962, a project to construct a new alignment of SH-58 between SH-45 near Helena in Alfalfa County and the Major County Line was completed.
On August 21, 1939, the project to pave a 7 mile section of US-270/Northwest Highway from May Ave. in Oklahoma City east to the Canadian County Line was approved.
On August 22, 1969, a project to pave a 5 mile section of I-40 near Vian in Sequoyah County completed.
On August 24, 1924, State Highway Numbered Route Designation was approved by the Commission. The first routes were numbered State Highways 1 through 26.
On August 24, 1936, the first inventory of all roads in Craig, Ottawa and Woods Counties was completed and preparation began of the first county transportation maps.
On August 25, 1979, a project to reconstruct and realign a curved section SH-4 near Smithville in McCurtain County was completed.
On August 26, 1946, the Highway Commission approved the designation of SH-37A. from US-62 west of Moore to SH 152. In Grady Co.
On August 27, 1964, the I-40 project to construct 5 miles of I-40 beginning at US-75 in Henryetta and extending east was completed in Okmulgee County.
On August 28, 1924, the first official Oklahoma map depicting the new Highway Numbered Routes was approved by the Highway Commission.
On August 28, 1929, the Highway Commission approved the dedication of SH-56 from the Konawa Toll Bridge northeast to SH-3 south of Wewoka in Seminole County.
On August 29, 1963, the project to construct 3 miles of I-40 near US-69 in McIntosh County was completed.
On August 30, 1945, the construction of a new Honey Creek Bridge across Grand Lake in Delaware County was approved. The original bridge was washed out in the floods of May 1943.
