Iowa Railroad Ties Newsletter, March 2006

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.

Iowa Railroad Ties Newsletter, July 2006

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.

Iowa Railroad Ties, January 2007

Quarterly newsletter of the Iowa Department of Transportation's Office of Rail Transportation.

Iowa Railroad Ties, May 2007

Quarterly newsletter of the Iowa Department of Transportation's Office of Rail Transportation.

Investigation of Electromagnetic Gauges for Determining In-Place HMA Density, 2007

Density is an important component of hot-mix asphalt (HMA) pavement quality and long-term performance. Insufficient density of an in-place HMA pavement is the most frequently cited construction-related performance problem. This study evaluated the use of electromagnetic gauges to nondestructively determine densities. Field and laboratory measurements were taken with two electromagnetic gauges—a PaveTracker and a Pavement Quality Indicator (PQI). Test data were collected in the field during and after paving operations and also in a laboratory on field mixes compacted in the lab. This study revealed that several mix- and project-specific factors affect electromagnetic gauge readings. Consequently, the implementation of these gauges will likely need to be done utilizing a test strip on a project- and mix-specific basis to appropriately identify an adjustment factor for the specific electromagnetic gauge being used for quality control and quality assurance (QC/QA) testing. The substantial reduction in testing time that results from employing electromagnetic gauges rather than coring makes it possible for more readings to be used in the QC/QA process with real-time information without increasing the testing costs.

Iowa Railroad Ties, Fall 2007

Quarterly newsletter of the Iowa Department of Transportation's Office of Rail Transportation.

Iowa Railroad Ties, Fall 2007

Newsletter produced by the Iowa Department of Transportation's Office of Rail Transportation.

Railroad Ties, April 2008

Iowa Department of Transportation's Office of Rail Transportation newsletter

Railroad Abandonment, Revised March, 23, 1997

Abandonment and discontinuance of railroad service is allowed by federal law which permits a carrier to end its obligation to provide common carrier service over a particular rail line. Although a number of specific reasons may be given for the abandonment, it is generally based on economic factors. This booklet is intended to provide information about the abandonment process and some guidance concerning how to prepare for an abandonment. This information is based on rules established by the Interstate Commerce Commission Termination Act of 1995, the Surface Transportation Board (successor to the former Interstate Commerce Commission), and the Staggers Rail Act of 1980, and the policies and procedures of the Iowa Department of Transportation.

Iowa Railroad Base Map, July 1, 2009

Iowa railroad map of Iowa trains.

Iowa Railroad Service Map, July 1, 2009

Iowa railroad service map of Iowa trains in color.

Chronology of Iowa Railroad Abandonments, July 1, 2009

Iowa railroad chronology of Iowa Railroad Abandonments.

Iowa Railroad Traffic Density, July 1, 2009

Iowa railroad traffic density.

Use of Railroad Flat Cars for Low-Volume Road Bridges, August 1999

In an attempt to solve the bridge problem faced by many county engineers, this investigation focused on a low cost bridge alternative that consists of using railroad flatcars (RRFC) as the bridge superstructure. The intent of this study was to determine whether these types of bridges are structurally adequate and potentially feasible for use on low volume roads. A questionnaire was sent to the Bridge Committee members of the American Association of State Highway and Transportation Officials (AASHTO) to determine their use of RRFC bridges and to assess the pros and cons of these bridges based on others’ experiences. It was found that these types of bridges are widely used in many states with large rural populations and they are reported to be a viable bridge alternative due to their low cost, quick and easy installation, and low maintenance. A main focus of this investigation was to study an existing RRFC bridge that is located in Tama County, IA. This bridge was analyzed using computer modeling and field load testing. The dimensions of the major structural members of the flatcars in this bridge were measured and their properties calculated and used in an analytical grillage model. The analytical results were compared with those obtained in the field tests, which involved instrumenting the bridge and loading it with a fully loaded rear tandem-axle truck. Both sets of data (experimental and theoretical) show that the Tama County Bridge (TCB) experienced very low strains and deflections when loaded and the RRFCs appeared to be structurally adequate to serve as a bridge superstructure. A calculated load rating of the TCB agrees with this conclusion. Because many different types of flatcars exist, other flatcars were modeled and analyzed. It was very difficult to obtain the structural plans of RRFCs; thus, only two additional flatcars were analyzed. The results of these analyses also yielded very low strains and displacements. Taking into account the experiences of other states, the inspection of several RRFC bridges in Oklahoma, the field test and computer analysis of the TCB, and the computer analysis of two additional flatcars, RRFC bridges appear to provide a safe and feasible bridge alternative for low volume roads.

Iowa State Railroad Map, July 1, 2010

Iowa railroad map of Iowa trains.