Skid Resistance of the Secondary Road System in Iowa, MLR-77-1, 1977

The Iowa Department of Transportation has been conducting skid resistance tests on the paved secondary system on a routine basis since 1973. This report summarizes the data obtained through 1976 on 10,101 miles in 95 of the 99 counties in Iowa. A summary of the skid resistance on the secondary system is presented by pavement type and age. The data indicates that the overall skid resistance on this road system is excellent. Higher traffic roads (over 1000 vehicles per day) have a lower skid resistance than the average of the secondary roads for the same age and pavement type. The use of non-polishing aggregates in asphaltic concrete paving surface courses and transverse grooving of portland cement concrete paving on high traffic roads is recommended. The routine resurvey of skid resistance on the secondary road system on a 5-year interval is probably not economically justified and could be extended to a 10-year interval.

Structural Analysis and Overlay Design of Pavements Using the Road Rater, MLR-84-3, 1986

In recent years the Iowa DOT has shifted emphasis from the construction of new roads to the maintenance and preservation of existing highways. A need has developed for analyzing pavements structurally to select the correct rehabilitation strategy and to properly design a pavement overlay if necessary. This need has been fulfilled by Road Rater testing which has been used successfully on all types of pavements to evaluate pavement and subgrade conditions and to design asphaltic concrete overlays. The Iowa Road Rater Design Method has been simplified so that it may be easily understood and used by the widely diverse groups of individuals which may be involved in pavement restoration and management. Road Rater analysis techniques have worked well to date and have been verified by pavement coring, soils sampling and testing, and pavement removal by block sampling. Void detection testing has also been performed experimentally in Iowa, and results indicate that the Road Rater can be used to locate pavement voids and that Road Rater analysis techniques are reasonably accurate. The success of Road Rater research and development has made deflection test data one of the most important pavement management inputs.

Road Map Math, 1976

Road Map Math is an instructional program for low-achieving students in grades four to twelve. It is helpful in teaching language arts, place geography, map reading and mathematics. This booklet was made in conjunction with Department of Public Instruction, Price Laboratory School at the University of Northern Iowa and the Planning and Research Division of the Iowa Department of Transportation.

The Governor's Blue Ribbon Transportation Task Force: Implementation Report for Maximizing the Efficient Use of Iowa's Road Use Tax Fund, 1998

This report documents the Iowa Department of Transportation's accomplishments and ongoing efforts in response to 39 recommendations proposed by the Governor's Blue Ribbon Transportation Task Force at the end of 1995. Governor Terry Branstad challenged the Task Force to "maximize the benefits of each dollar spent from the Road Use Tax Fund."

Iowa Militiaman, Winter 2004

The Iowa Militiaman is an unofficial publication authorized under the provisions of AR 360-81. It is published by the 135th Mobile Public Affairs Detachment, Camp Dodge, Johnston, Iowa 50131, and is printed four times annually. The news and opinions expressed in this publication are not necessarily those of the Adjutant General of Iowa, or the Department of the Army.

Iowa Militiaman, Winter 2008

The Iowa Militiaman is an unofficial publication authorized under the provisions of AR 360-81. It is published by the 135th Mobile Public Affairs Detachment, Camp Dodge, Johnston, Iowa 50131, and is printed four times annually. The news and opinions expressed in this publication are not necessarily those of the Adjutant General of Iowa, or the Department of the Army.

Iowa Militiaman, Winter 2009

The Iowa Militiaman is an unofficial publication authorized under the provisions of AR 360-81. It is published by the 135th Mobile Public Affairs Detachment, Camp Dodge, Johnston, Iowa 50131, and is printed four times annually. The news and opinions expressed in this publication are not necessarily those of the Adjutant General of Iowa, or the Department of the Army.

Iowa Militiaman, Winter 2011

The Iowa Militiaman is an unofficial publication authorized under the provisions of AR 360-81. It is published by the 135th Mobile Public Affairs Detachment, Camp Dodge, Johnston, Iowa 50131, and is printed four times annually. The news and opinions expressed in this publication are not necessarily those of the Adjutant General of Iowa, or the Department of the Army.

Iowa Militiaman, Winter 2012

The Iowa Militiaman is an unofficial publication authorized under the provisions of AR 360-81. It is published by the 135th Mobile Public Affairs Detachment, Camp Dodge, Johnston, Iowa 50131, and is printed four times annually. The news and opinions expressed in this publication are not necessarily those of the Adjutant General of Iowa, or the Department of the Army.

Winter Weather A guide for Your Safety, January 17, 2012

A major winter storm can be lethal. Preparing for cold weather conditions and responding to them effectively can reduce the dangers caused by winter storms.

Quantifying Uncertainty in Real Time Performance Measurement for Highway Winter Maintenance Operations – Phase 2, RB03-013, 2014

Winter weather in Iowa is often unpredictable and can have an adverse impact on traffic flow. The Iowa Department of Transportation (Iowa DOT) attempts to lessen the impact of winter weather events on traffic speeds with various proactive maintenance operations. In order to assess the performance of these maintenance operations, it would be beneficial to develop a model for expected speed reduction based on weather variables and normal maintenance schedules. Such a model would allow the Iowa DOT to identify situations in which speed reductions were much greater than or less than would be expected for a given set of storm conditions, and make modifications to improve efficiency and effectiveness. The objective of this work was to predict speed changes relative to baseline speed under normal conditions, based on nominal maintenance schedules and winter weather covariates (snow type, temperature, and wind speed), as measured by roadside weather stations. This allows for an assessment of the impact of winter weather covariates on traffic speed changes, and estimation of the effect of regular maintenance passes. The researchers chose events from Adair County, Iowa and fit a linear model incorporating the covariates mentioned previously. A Bayesian analysis was conducted to estimate the values of the parameters of this model. Specifically, the analysis produces a distribution for the parameter value that represents the impact of maintenance on traffic speeds. The effect of maintenance is not a constant, but rather a value that the researchers have some uncertainty about and this distribution represents what they know about the effects of maintenance. Similarly, examinations of the distributions for the effects of winter weather covariates are possible. Plots of observed and expected traffic speed changes allow a visual assessment of the model fit. Future work involves expanding this model to incorporate many events at multiple locations. This would allow for assessment of the impact of winter weather maintenance across various situations, and eventually identify locations and times in which maintenance could be improved.

CenterLines, Winter 2014

CenterLines for Families, the newsletter of the Center for Disabilities and Development at the University of Iowa Children’s Hospital, is published four times a year. It provides families with current information on child and adult development, issues affecting people with disabilities, and CDD resources available to them and their families.

CenterLines, Winter 2013

CenterLines for Families, the newsletter of the Center for Disabilities and Development at the University of Iowa Children’s Hospital, is published four times a year. It provides families with current information on child and adult development, issues affecting people with disabilities, and CDD resources available to them and their families.

CenterLines, Winter 2012

CenterLines for Families, the newsletter of the Center for Disabilities and Development at the University of Iowa Children’s Hospital, is published four times a year. It provides families with current information on child and adult development, issues affecting people with disabilities, and CDD resources available to them and their families.