Annual Report of the Iowa Highway Research Board Research and Development Activities FY 2009

The Highway Division of the Iowa Department of Transportation (Iowa DOT) engages in research and development for two reasons: first, to find workable solutions to the many problems that require more than ordinary, routine investigation; and second, to identify and implement improved engineering and management practices. This report, entitled ―Iowa Highway Research Board Research and Development Activities FY2009‖ is submitted in compliance with Sections 310.36 and 312.3A, Code of Iowa, which direct the submission of a report of the Secondary Road Research Fund and the Street Research Fund, respectively. It is a report of the status of research and development projects in progress on June 30, 2009. It is also a report on projects completed during the fiscal year beginning July 1, 2008 and ending June 30, 2009. Detailed information on each of the research and development projects mentioned in this report is available from the Research and Technology Bureau, Highway Division, Iowa Department of Transportation. All approved reports are also online for viewing at: www.iowadot.gov/operationsresearch/reports.aspx.

Annual Report of the Iowa Highway Research Board – Research and Development Activities FY 2010

This report, entitled “Iowa Highway Research Board Research and Development Activities FY 2010” is submitted in compliance with Sections 301.35 and 312.3A, Code of Iowa, which direct the submission of a report of the Secondary Road Research Fund and the Street Research Fund, respectively. T is a report of the status of research and development projects in progress on June 20, 2010. It is also a report on projects completed during the fiscal year beginning July 1, 2009, and ending June 30, 2010. Detailed information on each of the research and development projects mentioned in this report is available from the Research and Technology Bureau, Highway Division, Iowa Department of Transportation. All approved reports are also online for viewing at www.iowadot.gov/operationsresearch/reports.aspx

Annual Report of Iowa Highway Research Board Research and Development Activities FY 2011, December 2011

The Highway Division of the Iowa DOT engages in research and development for two reasons: first, to find workable solutions to the many problems that require more than ordinary, routine investigation; and second, to identify and implement improved engineering and management practices. This report, entitled ―Iowa Highway Research Board Research and Development Activities FY2011‖ is submitted in compliance with Sections 310.36 and 312.3A, Code of Iowa, which direct the submission of a report of the Secondary Road Research Fund and the Street Research Fund, respectively. It is a report of the status of research and development projects in progress on June 30, 2011. It is also a report on projects completed during the fiscal year beginning July 1, 2010 and ending June 30, 2011. Detailed information on each of the research and development projects mentioned in this report is available from the Research and Technology Bureau, Highway Division, Iowa Department of Transportation. All approved reports are also online for viewing at: www.iowadot.gov/operationsresearch/reports.aspx.

Iowa Highway Research and Development Activities FY2014

This report, entitled Iowa Highway Research and Development Activities FY2014 is submitted in compliance with Iowa Code sections 310.36 and 312.3A, which direct the submission of a report of the Secondary Road Research Fund and the Street Research Fund, respectively. It is a report of the status of research and development projects in process on June 20, 2014. It is also a report on projects completed during the fiscal year beginning July 1, 2013 and ending June 30, 2014. Detailed information on each of the research and development projects mentioned in this report is available from the office of Research and Analytics, Performance and Technology Division, Iowa Department of Transportation. All approved reports are also online for viewing at: http://www.iowadot.gov/research/pdf/IHRBAnnualReport.pdf.

Iowa Highway Research Board Research and Development Activities FY 2015

This report, entitled Iowa Highway Research and Development Activities FY 2015, is submitted in compliance with Iowa Code section 310.36 and 312.3A, which direct the submission of a report of the Secondary Road Research Fund and the Street Research Fund, respectively. It is a report of the status of research and development projects in process on June 30, 2015. It is also a report on projects completed during the fiscal year beginning July 1, 2014 and ending June 30, 2015. Detailed information on each of the research and development projects mentioned in this report is available from the office of Research and Analytics, Performance and Technology Division, Iowa Department of Transportation. All approved reports are also online for viewing at http://www.iowadot.gov/research/pdf/IHRBAnnualReport.pdf.