Department of Transportation Performance Plan, Iowa Department of Transportation, 2007

Performance plan for Iowa Department of Transportation.

Lane Closure Policy Development, Enforcement, and Exceptions: A Survey of Seven State Transportation Agencies, February 2007

Traffic volume increases and an aging infrastructure create the need for reconstruction, rehabilitation, and maintenance of existing facilities. As more motorists feel that delays should be minimal during highway renewal projects, lane closures that reduce capacity through the work zone should not create unreasonable delays. In order to facilitate the determination of when a lane closure is permitted during the day, some state transportation agencies (STAs) have developed lane closure policies, or strategies, that they use as guidance in determining daily permitted lane closure times. Permitted lane closure times define what times of the day, week, or season a lane closure is allowed on a facility and at a specific location or segment. This research addresses the lane closure policies of several STAs that were reputed to have good lane closures policies or strategies and that were selected by the project advisory committee for further research.

Secondary Accident Data Fusion for Assessing Long-Term Performance of Transportation Systems, 2007

Secondary accident statistics can be useful for studying the impact of traffic incident management strategies. An easy-to-implement methodology is presented for classifying secondary accidents using data fusion of a police accident database with intranet incident reports. A current method for classifying secondary accidents uses a static threshold that represents the spatial and temporal region of influence of the primary accident, such as two miles and one hour. An accident is considered secondary if it occurs upstream from the primary accident and is within the duration and queue of the primary accident. However, using the static threshold may result in both false positives and negatives because accident queues are constantly varying. The methodology presented in this report seeks to improve upon this existing method by making the threshold dynamic. An incident progression curve is used to mark the end of the queue throughout the entire incident. Four steps in the development of incident progression curves are described. Step one is the processing of intranet incident reports. Step two is the filling in of incomplete incident reports. Step three is the nonlinear regression of incident progression curves. Step four is the merging of individual incident progression curves into one master curve. To illustrate this methodology, 5,514 accidents from Missouri freeways were analyzed. The results show that secondary accidents identified by dynamic versus static thresholds can differ by more than 30%.

Fiscal Year 2008-2012 Iowa Transportation Improvement Program

This document was prepared by the Iowa Department of Transportation to inform Iowans of planned investments in the state's transportation system over the next five years.

Audit report on the Iowa Department of Transportation for the year ended June 30, 2006

Audit report on the Iowa Department of Transportation for the year ended June 30, 2006

Audit report on the Iowa Department of Transportation for the year ended June 30, 2006

Audit report on the Iowa Department of Transportation for the year ended June 30, 2006

Iowa Department of Transportation; Equipment and Vehicle Purchase Report for Fiscal Year 2007

This is the Iowa Department of Transportation's Equipment and Vehicle Purchase Report for Fiscal Year 2007 as required by Iowa Code section 307.47. The report is sorted by our accounting object codes.

Iowa Department of Transportation Office of Contracts Letting Summary July 1, 2006 through June 30, 2007

Twelve regularly scheduled lettings and seven emergency/special lettings were held by the Iowa Department of Transportation for construction and maintenance work during the period covered by this report. At these lettings, projects totaling $492,299,871 were approved.

Report of Highway Research Board Research and Development Activities FY2007

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; second, to identify and implement improved engineering and management practices. This report, entitled “Iowa Highway Research Board Research and Development Activities FY2007” 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, which were in progress on June 30, 2007; it is also a report on projects completed during the fiscal year beginning July 1, 2006, and ending June 30, 2007. Detailed information on each of the research and development projects mentioned in this report is available in the Research and Technology Bureau in the Highway Division of the Iowa Department of Transportation.

Iowa Department of Transportation report on funds received from the Rebuild Iowa Infrastructure Fund, the State Recreational Trails Fund, the Health Restricted Capitals and the Rail Revolving Loan and Grant Program in fiscal year 2007

House file 2782 (2007 Infrastructure Appropriations Act) requires state agencies that receive appropriations from specific funds to report that information. The Iowa Department of Transportation received funds from the Rebuild Iowa Infrastructure Fund, the State Recreational Trails Fund, the Health Restricted Capitals, and the Rail Revolving Loan and Grant Program in FY 2007. These are the status reports for those funds and the status of the FY2006 funds received from the State Recreational Trails Fund, the Rebuild Iowa Infrastructure Fund and the Tobacco Settlement Trust Fund.

Report on the Iowa Department of Transportation for the year ended June 30, 2007

Report on the Iowa Department of Transportation for the year ended June 30, 2007

Archaeology on the Road, July 2008

Team Archaeology is excited to be riding with you this year! We hope to make our participation an annual opportunity to share the story of Iowa’s amazing past. As you ride across the state you will be passing by the locations of hundreds of known archaeological sites and an as yet unknown number of new discoveries waiting to be made. These archaeological sites, and the artifacts they contain, tell the history of the first people to travel this landscape and the stories of each generation that has contributed to what we know of ourselves today. As you travel through our beautiful state, you too are now a part of that story, making history for the future to learn and wonder about! The Office of the State Archaeologist serves a unique dual role in Iowa as both a designated research unit of The University of Iowa and as a state agency. The larger mission of the OSA is to develop, disseminate, and preserve knowledge of Iowa’s human past through Midwestern and Plains archaeological research, scientific discovery, public stewardship, service, and education. It is our goal to provide all Iowans the opportunity to learn about their past. I see this as an investment in the preservation of a nonrenewable resource—the archaeological record of Iowa. Look for the Team Archeology members as you ride and be sure to ask them about Iowa archeology. Please help yourself to free materials about our shared past from our information tables at each overnight town and get one of the free Iowa Archeology wrist bands. There will also be free public talks by local archaeologists each afternoon, as well as flintknapping and other demonstrations of archaeological interest, so keep this booklet as your guide to the week’s activities. Most of all, ride smart, be safe, and when you get home tell your friends and neighbors about Iowa archaeology!

GO! Explore the World of Transportation, January - February 2007

Newsletter produced by the Iowa Department of Transport.

Infrastructure and Transportation Task Force Report, August 2008

The Rebuild Iowa Infrastructure and Transportation Task Force is acutely aware of the critical role infrastructure plays in Iowa’s communities, the lives of the residents, and the economic well-being of the state. With encouragement to the Rebuild Iowa Advisory Commission (RIAC) for its consideration of great need for infrastructure and transportation repairs, the Task Force provides its assessment and recommendations. As the RIAC fulfills its obligations to guide the recovery and reconstruction in Iowa, infrastructure and transportation must be recognized for its impact on all Iowans. The tornadoes, storms, and floods were devastating to infrastructure and transportation systems across the state. The damage did not distinguish between privately-owned and public assets. The significance of the damage emerges further with the magnitude of the damage estimates. Infrastructure includes components that some might initially overlook, such as communication systems, landfills, and water treatment. The miles of damaged roads and bridges are more evident to many Iowans. Given the reliance on infrastructure systems, many repairs are already underway, though gaps have emerged in the funding for repairs to certain infrastructure systems.

Department of Transportation Performance Plan, FY 2009

Agency Performance Plan