Road to Success, July 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, August 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, January 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, October 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, November 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, December 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, December 2005

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, February 2006

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, March 2006

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, May 2006

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Road to Success, April 2006

Monthly newsletter produced by Iowa Department of Vocational Rehabilitation

Volume of Traffic on the Primary Road System, 2002

The Office of Transportation Data, in cooperation with the Federal Highway Administration, prepares this biennial traffic report. This report is used by federal, state, and local governmental agencies in determining highway needs, construction priorities, route location and environmental impact studies, and the application of appropriate design standards. The general public uses this information in determining the amount of traffic that passes a given area as they make their development plans and propose land use changes. The above reflects only a few of the many technical uses for this data.

Evaluation of U.S. and European Concrete Pavement Noise Reduction Methods, July 2006

Highway noise is one of the most pressing of the surface characteristics issues facing the concrete paving industry. This is particularly true in urban areas, where not only is there a higher population density near major thoroughfares, but also a greater volume of commuter traffic (Sandberg and Ejsmont 2002; van Keulen 2004). To help address this issue, the National Concrete Pavement Technology Center (CP Tech Center) at Iowa State University (ISU), Federal Highway Administration (FHWA), American Concrete Pavement Association (ACPA), and other organizations have partnered to conduct a multi-part, seven-year Concrete Pavement Surface Characteristics Project. This document contains the results of Part 1, Task 2, of the ISU-FHWA project, addressing the noise issue by evaluating conventional and innovative concrete pavement noise reduction methods. The first objective of this task was to determine what if any concrete surface textures currently constructed in the United States or Europe were considered quiet, had long-term friction characteristics, could be consistently built, and were cost effective. Any specifications of such concrete textures would be included in this report. The second objective was to determine whether any promising new concrete pavement surfaces to control tire-pavement noise and friction were in the development stage and, if so, what further research was necessary. The final objective was to identify measurement techniques used in the evaluation.