A route U.S. 66 condition survey was undertaken by the Illinois Division of Highways in 1949 in response to a need to document the association believed by most engineers to exist between axle loads and pavement damage. It was a load-condition type of study in which repetitive surveys were made to obtain a condition history of the pavements under observation. Routine axle weighings and classified vehicle counts that had been made for many years prior to the study and which continued during the study were expected to furnish the required load history information. During the course of the survey, on which field work was concluded in 1967, it became recognized that such surveys probably would never develop the sought-after load-condition relationship. The route 66 condition survey did, however, furnish a large quantity of essential data that was used in modifying the formulas devised to depict the load-condition relationships developed at the AASHO Road Test to produce pavement design equations that represented actual service conditions in Illinois. The survey also furnished a considerable amount of qualitative information on pavement and shoulder designs and materials in use in Illinois.
Route U.S. 66 Condition Survey
1971
43 pages
Report
No indication
English
Rapid Determination of Route Condition
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