During the summer of 1940 the Kentucky Department of Highways, with the Public Roads Administration participating, constructed 6.27 miles of investigational pavement as a cooperative research project on joint spacing. This project was one of six planned by the Public Roads Administration and the Portland Cement Association in cooperation with six highway departments. The five other states participating were California, Michigan, Hinnesota, Missouri, and Oregon. The project selected for this jointing study in Kentucky is in Daviess County, approximately six miles southeast of Owensboro, on Kentucky Route No. 71 (Layout map in Figure 1).

The experimental program was outlined for the purpose of evaluating the relative merits of varying intervals in expansion joint spacing and of dummy contraction joints with and without dowel bars for load transfer. A complete discussion of the scope and purpose has been given in a paper by Mr. E. F. Kelly of the Public Roads Administration.

Report Date


Report Number

No. 47

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