Analysis of Policies for Safety Improvements on Low-volume Rural Roadways


Book Description

In order to determine the adequacy with which safety problems on low-volume rural roadways were addressed by the four states of Federal Region VII (Iowa, Kansas, Missouri, and Nebraska), a review was made of the states' safety policies. After reviewing literature dealing with the identification of hazardous locations, evaluation methodologies, and system-wide safety improvements, a survey of the states' safety policies was conducted. An official from each state was questioned about the various aspects and procedures dealing with safety improvements. After analyzing and comparing the remarkably diverse policies, recommendations were made in the form of a model safety program. This program included special modifications that would help remediate hazards on low-volume rural roadways. Especially encouraged is a system-wide approach to improvement which would cover all parts of the highway system, not just urban and high-volume roadways.







Evaluation of Mitigation for Safety Concerns on Low-Volume, Unpaved Rural Roads


Book Description

The Institute for Transportation (InTrans) at Iowa State University completed work on an in-depth study of crash history on lowvolume, rural roads in Iowa in December 2010. Results indicated that unpaved roads with traffic volumes greater than 100 vehicles per day (vpd) exhibit significantly higher crash frequencies, rates, and densities than any other class of low-volume road examined, paved or unpaved. The total mileage for this class of roadway in Iowa is only about 4,400 miles, spread over 99 counties in the state, which is certainly a manageable number of miles for individual rural agencies. The purpose of this study was to identify and examine several unpaved, local road segments with higher than average crash frequencies, select and undertake potentially-beneficial mitigation, and evaluate the results as time allowed. A variety of low-cost options were considered, including engineering improvements, enhanced efforts by law enforcement, and educational initiatives. Using input, active support, and participation from local agencies and state and Federal safety advocates, the study afforded a unique opportunity to examine useful tools for local rural agencies to utilize in addressing safety on this particular type of roadway.







Safety for Low Volume Unpaved Roads


Book Description

Modern societies have developed excellent practices and procedures for improving safety. Most of these efforts have focused on safety issues on high volume paved roads. However, the situation on unpaved roads is not as encouraging. Scarce resources have governments in their efforts to provide safer roadway environments on these facilities. Due to the increased level of litigation arising from claims of negligence, it is no longer acceptable to do nothing because of limited resources. This paper provides a realistic approach to the dilemma faced by local officials responsible for unpaved roads. It is based on research conducted since 1994 in defining a new set of criteria to assist local governments in improving unpaved road safety. Worldwide, safety improvements are needed on low volume unpaved roads. This paper also presents approaches used to improve local rural unpaved road safety. Safety improvements include definable benefits for the real world; benefits that are practical, needed, and acceptable. The examples presented in this paper serve as guidelines to define, analyze, and solve existing safety problems. Although techniques to improve local unpaved road safety use proven technology, the acceptance of the approach reported in this paper will advance the state-of-the-art by developing into a format which can be used by real world practitioners. Case study surveys of practitioners, users and safety experts are presented to help define the proposed safety improvement program. A Delphi procedure was used to document the final analysis approach. For the covering abstract of this conference see IRRD number 872978.




Gravel Roads


Book Description

The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.







Safety Analysis of Low-volume Rural Roads in Iowa


Book Description

By identifying safety concerns on low-volume rural roads, local agencies can cost-effectively priortize mitigative action.