As Executive Secretary of both the President's Committee on a National Highway Program (the so-called "Clay Committee") and the Inter-agency Committee, Turner collected administrative materials and correspondence for both committees. Series 2. also includes correspondence, background materials, and reports. Subseries 2.1 contains collected correspondence, background materials, and policy statements on the highway program by interested industry groups, associations, and politicians. The files are arranged alphabetically by the association name. Subseries 2.2 consists of files containing background information on financing the highway program and publicity and public reaction to the program. The files are arranged alphabetically by subject. Subseries 2.3 concludes the series with the official statements and testimonies heard by the Clay Committee, arranged chronologically.

This series contains subject files collected by Turner on various transportation issues of the day and on the legislation related to his field.

This series contains correspondence, speeches, and conference materials. Turner belonged to a large number of transportation associations, both formal and informal, from national organizations, such as the Highway Users Federation, to lunch groups such as " The Road Gang." Many of the groups share the same key leaders, an attribute that is especially apparent in the intriguingly entitled "No Name Group."

This series contains studies from several individuals and organizations that recorded the history of the development of the interstate highway system. The most extensive research was carried out by the Public Works Historical Society, under the sponsorship of the American Public Works Association and the American Association of State Highway Transportation Officials.

This series is comprised of 4 folders in box 6 (6/20 through 6/23) containing published writings and official remarks and statements, bound in four volumes.

This series is comprised of 9 folders in box 7 (7/18 through 7/26) containing correspondence, certificates, and publicity about a few of the honors received by Turner over the course of his career. Similar material may be located in Series 7 if the award was bestowed by a transportation association.

These records begin with the personnel files (1929-1972) Turner retrieved from the Federal Highway Administration (FHWA) in 1995. Correspondence about these files includes reference to FHWA personnel killed in the Oklahoma City bombing that year. Turner's Bureau of Public Roads (BPR) reports are arranged in chronological order, as are his BPR correspondence and reports.

S1-01/1-4: Bureau of Public Roads and Federal Highway Administration Personnel Files, 1929-1995 (bulk: 1929-1972)

S1-01/5-14: Bureau of Public Roads Reports, 1930-1939

S1-01/15: Textbooks and Thesis, 1940

S1-01/16-31: Bureau of Public Roads Correspondence and Reports, 1939-1968

This series is comprised of several subject files, such as a file with internal memoranda about bicycle lanes, and a file that contains notes for speeches Turner made as Administrator of the Federal Highway Administration. A 1973 letter referring to Turner's retirement and materials on Turner's participation in an FHWA 100-year time capsule dedication ceremony on June 14, 1994, are also included.

Immediately upon his retirement from the Federal Highway Administration, Turner was commissioned by the International Road Federation to help conduct a three-year study of 31 urban areas in 14 countries. The information he and co-author Harmer E. Davis gathered from cities in Japan, Mexico, the United Kingdom, and the United States make up the bulk of this series. However, Turner acted as a consultant, both paid and unpaid, for many other agencies and associations. Correspondence, notes, maps, photographs, speeches, and reports on this work.