15. Supplementary Notes Project performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration. 16. Abstract TxDOT initiated the rigid pavement database project to collect information on the general performance of portland cement concrete (PCC) pavement as well as to collect project-level information on PCC pavement responses and performance. A total...

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This report deals with the evaluation of the ultimate behavior of AASHTO I-beams with concrete strengths up to 9000 psi. The relevant AASHTO and IDOH design specifications are thoroughly evaluated based on the results of this research. The findings of this study remark the many beneficial implications of the use of higher strength concrete in precast prestressed AASHTO I-beams. Higher strength ...

Mega-regions are considered to be the new geography that may become the nation’s operative regions, according to the March 2010 FHWA Strategic Plan. Such regions need analysis tools to evaluate scenarios and their regional impacts. These tools have to cover areas larger than covered by the typical Metropolitan Planning Organization (MPO) or State Department of Transportation (DOT) models. In ad...

High traffic demands have led to widening of existing highways to accommodate increased traffic volume. However, due to the high cost of additional right-of-way and limited space available at job sites, construction of earth retaining walls is often done under a constrained space. This leads to retaining walls that are narrower than in design guidelines. This type of walls is referred as “Narro...