Investigations being undertaken cover (1) study of amount of impact delivered by motor trucks to roads, (2) study of effect of this impact on different types of road surfaces, (3) study of effect of traffic on different types of road surfaces, and (4) study of bearing power of subgrades as affected by moisture.
New highway tests being made by the bureau of public roads
Good Roads
Good Roads ; 19 , n 7
1920
2 pages
Article (Journal)
English
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