In 2004, the Michigan Department of Transportation (MDOT) began a comprehensive program to implem... more In 2004, the Michigan Department of Transportation (MDOT) began a comprehensive program to implement engineering countermeasures to address the needs of older drivers. The countermeasures included the use of Clearview Font on Guide Signs (freeway and non-freeway), installation of Box Span signals, installation of pedestrian countdown signals, use of Fluorescent Yellow Sheeting on warning signs, and use of arrow-per-lane on guide signs. This study aimed at evaluating safety benefits of the selected countermeasures. Evaluation was performed through a perception survey of Michigan drivers and analysis of crash data. Safety Performance Functions (SPF) for these improvements were developed as part of the study. Crash Modification Factors (CMF) for each countermeasure were developed through the before-after analysis of crash data. Finally, the benefit cost analysis of each countermeasure was performed and is documented in this report.
Local road practitioners across the country play a critical role in addressing crash risks at the... more Local road practitioners across the country play a critical role in addressing crash risks at the local level and may be able to identify the specific or unique conditions that contribute to crashes within their jurisdictions. The Local Road Safety Plan (LRSP) offers a foundation for consensus and focus. It defines key emphasis areas and strategies that impact local rural roads and provides a framework to accomplish safety enhancements at the local level. The LRSP helps communities take a proactive stance in reducing and preventing local road fatalities and injuries. This paper focuses on the recently completed US guidelines for the development Local Road Safety Plans (LRSP) and how they can potentially be applied in Canadian jurisdictions. These guidelines are summarized in the US Federal Highway Administration (FHWA) report Developing Safety Plans: A Manual for Local Rural Road Owners and how they can be practically applied in Canadian communities. (A) For the covering abstract of...
This research was conducted to assist the Michigan Department of Transportation in assessing the ... more This research was conducted to assist the Michigan Department of Transportation in assessing the State's current delineation program. Opus International Consultants (Opus) and Western Michigan University (WMU) were retained to undertake this review and analysis, including a review of existing literature and current state-of-the-art, a delineation survey with follow-up of state and Canadian provinces, and finally a benefit-cost and alternatives analysis to consider potential changes to MDOT's existing program. In the Michigan context, statistical analysis shows potential benefits for wider adaptation of polyurea pavement markings, snowplowable raised pavement markers on high-AADT roadways, and freeway lighting at interchanges.
This report documents evaluation results and recommendations for Michigan commercial vehicle enfo... more This report documents evaluation results and recommendations for Michigan commercial vehicle enforcement strategies and facilities. Through literature review, online survey and site visits, enforcement strategies and facilities in other states and countries were studied. Site visits of existing Michigan commercial vehicle enforcement sites and review of current and past reports by the Michigan Department of Transportation (MDOT) and the Michigan State Police (MSP) revealed the existing conditions of facilities and potential needs for improvements. Benefit-cost analyses for the existing fixed weigh stations and other enforcement sites were conducted. The results indicated that addition of low-speed Weigh-In-Motion (WIM) with bypass lane is most likely to improve efficiency of a number of existing fixed weigh stations. Also, adding a preclearance system was found to improve efficiency of specific fixed weigh stations. The results, however, showed that fixed weigh stations are not econ...
This research was conducted to assist the Michigan Department of Transportation in assessing the ... more This research was conducted to assist the Michigan Department of Transportation in assessing the State's current delineation program. Opus International Consultants (Opus) and Western Michigan University (WMU) were retained to undertake this review and analysis, including a review of existing literature and current state-of-the-art, a delineation survey with follow-up of state and Canadian provinces, and finally a benefit-cost and alternatives analysis to consider potential changes to MDOT's existing program. In the Michigan context, statistical analysis shows potential benefits for wider adaptation of polyurea pavement markings, snowplowable raised pavement markers on high-AADT roadways, and freeway lighting at interchanges.
This report documents the evaluation of the performance and safety effectiveness of passing relie... more This report documents the evaluation of the performance and safety effectiveness of passing relief lanes within the State of Michigan. The study began with the identification of passing relief lanes within Michigan. This was followed by collecting historical volume data, implementation dates and crash history for each of the 10 study sites as well as for the 100 reference sites and 231 passing lanes in the State. The analysis of the passing relief lanes within Michigan included a literature review, a best practices review and summary, an evaluation of the crash data via a naive Empirical Bayes (EB) analysis and site visits to a select group of 10 passing relief lane study sites as determined by the study team. The site visits included speed data collection at a total of 50 locations; 5 locations for each passing relief lane study site. The analysis also found that the equivalent uniform annual benefit (EUAB) was less than 1.0; a cost analysis could not be conducted as no constructio...
Local road practitioners across the country play a critical role in addressing crash risks at the... more Local road practitioners across the country play a critical role in addressing crash risks at the local level and may be able to identify the specific or unique conditions that contribute to crashes within their jurisdictions. The Local Road Safety Plan (LRSP) offers a foundation for consensus and focus. It defines key emphasis areas and strategies that impact local rural roads and provides a framework to accomplish safety enhancements at the local level. The LRSP helps communities take a proactive stance in reducing and preventing local road fatalities and injuries. This document guides the development of an LRSP.
A research study was conducted to evaluate fixed weigh stations used for commercial vehicle enfor... more A research study was conducted to evaluate fixed weigh stations used for commercial vehicle enforcement to determine the best and economical improvements of such facilities in Michigan. Enforcement strategies and facilities in other states and countries were studied by performing a literature review, online survey, and site visits. Site visits of existing commercial vehicle enforcement strategies in Michigan and a review of current and past reports by the Michigan Department of Transportation (MDOT) and the Michigan State Police (MSP) revealed the potential need for improvements. Benefit-cost analyses for the existing fixed weigh stations were conducted by considering alternative options for improvements such as adding Weigh-In-Motion (WIM) sensors, changing site layout and adding preclearance systems. The results indicated that the addition of low-speed WIM scale with bypass lane is likely to improve efficiency of a number of existing fixed weigh stations in Michigan. Also, adding ...
In 2004, the Michigan Department of Transportation (MDOT) began a comprehensive program to implem... more In 2004, the Michigan Department of Transportation (MDOT) began a comprehensive program to implement engineering countermeasures to address the needs of older drivers. The countermeasures included the use of Clearview Font on Guide Signs (freeway and non-freeway), installation of Box Span signals, installation of pedestrian countdown signals, use of Fluorescent Yellow Sheeting on warning signs, and use of arrow-per-lane on guide signs. This study aimed at evaluating safety benefits of the selected countermeasures. Evaluation was performed through a perception survey of Michigan drivers and analysis of crash data. Safety Performance Functions (SPF) for these improvements were developed as part of the study. Crash Modification Factors (CMF) for each countermeasure were developed through the before-after analysis of crash data. Finally, the benefit cost analysis of each countermeasure was performed and is documented in this report.
Local road practitioners across the country play a critical role in addressing crash risks at the... more Local road practitioners across the country play a critical role in addressing crash risks at the local level and may be able to identify the specific or unique conditions that contribute to crashes within their jurisdictions. The Local Road Safety Plan (LRSP) offers a foundation for consensus and focus. It defines key emphasis areas and strategies that impact local rural roads and provides a framework to accomplish safety enhancements at the local level. The LRSP helps communities take a proactive stance in reducing and preventing local road fatalities and injuries. This paper focuses on the recently completed US guidelines for the development Local Road Safety Plans (LRSP) and how they can potentially be applied in Canadian jurisdictions. These guidelines are summarized in the US Federal Highway Administration (FHWA) report Developing Safety Plans: A Manual for Local Rural Road Owners and how they can be practically applied in Canadian communities. (A) For the covering abstract of...
This research was conducted to assist the Michigan Department of Transportation in assessing the ... more This research was conducted to assist the Michigan Department of Transportation in assessing the State's current delineation program. Opus International Consultants (Opus) and Western Michigan University (WMU) were retained to undertake this review and analysis, including a review of existing literature and current state-of-the-art, a delineation survey with follow-up of state and Canadian provinces, and finally a benefit-cost and alternatives analysis to consider potential changes to MDOT's existing program. In the Michigan context, statistical analysis shows potential benefits for wider adaptation of polyurea pavement markings, snowplowable raised pavement markers on high-AADT roadways, and freeway lighting at interchanges.
This report documents evaluation results and recommendations for Michigan commercial vehicle enfo... more This report documents evaluation results and recommendations for Michigan commercial vehicle enforcement strategies and facilities. Through literature review, online survey and site visits, enforcement strategies and facilities in other states and countries were studied. Site visits of existing Michigan commercial vehicle enforcement sites and review of current and past reports by the Michigan Department of Transportation (MDOT) and the Michigan State Police (MSP) revealed the existing conditions of facilities and potential needs for improvements. Benefit-cost analyses for the existing fixed weigh stations and other enforcement sites were conducted. The results indicated that addition of low-speed Weigh-In-Motion (WIM) with bypass lane is most likely to improve efficiency of a number of existing fixed weigh stations. Also, adding a preclearance system was found to improve efficiency of specific fixed weigh stations. The results, however, showed that fixed weigh stations are not econ...
This research was conducted to assist the Michigan Department of Transportation in assessing the ... more This research was conducted to assist the Michigan Department of Transportation in assessing the State's current delineation program. Opus International Consultants (Opus) and Western Michigan University (WMU) were retained to undertake this review and analysis, including a review of existing literature and current state-of-the-art, a delineation survey with follow-up of state and Canadian provinces, and finally a benefit-cost and alternatives analysis to consider potential changes to MDOT's existing program. In the Michigan context, statistical analysis shows potential benefits for wider adaptation of polyurea pavement markings, snowplowable raised pavement markers on high-AADT roadways, and freeway lighting at interchanges.
This report documents the evaluation of the performance and safety effectiveness of passing relie... more This report documents the evaluation of the performance and safety effectiveness of passing relief lanes within the State of Michigan. The study began with the identification of passing relief lanes within Michigan. This was followed by collecting historical volume data, implementation dates and crash history for each of the 10 study sites as well as for the 100 reference sites and 231 passing lanes in the State. The analysis of the passing relief lanes within Michigan included a literature review, a best practices review and summary, an evaluation of the crash data via a naive Empirical Bayes (EB) analysis and site visits to a select group of 10 passing relief lane study sites as determined by the study team. The site visits included speed data collection at a total of 50 locations; 5 locations for each passing relief lane study site. The analysis also found that the equivalent uniform annual benefit (EUAB) was less than 1.0; a cost analysis could not be conducted as no constructio...
Local road practitioners across the country play a critical role in addressing crash risks at the... more Local road practitioners across the country play a critical role in addressing crash risks at the local level and may be able to identify the specific or unique conditions that contribute to crashes within their jurisdictions. The Local Road Safety Plan (LRSP) offers a foundation for consensus and focus. It defines key emphasis areas and strategies that impact local rural roads and provides a framework to accomplish safety enhancements at the local level. The LRSP helps communities take a proactive stance in reducing and preventing local road fatalities and injuries. This document guides the development of an LRSP.
A research study was conducted to evaluate fixed weigh stations used for commercial vehicle enfor... more A research study was conducted to evaluate fixed weigh stations used for commercial vehicle enforcement to determine the best and economical improvements of such facilities in Michigan. Enforcement strategies and facilities in other states and countries were studied by performing a literature review, online survey, and site visits. Site visits of existing commercial vehicle enforcement strategies in Michigan and a review of current and past reports by the Michigan Department of Transportation (MDOT) and the Michigan State Police (MSP) revealed the potential need for improvements. Benefit-cost analyses for the existing fixed weigh stations were conducted by considering alternative options for improvements such as adding Weigh-In-Motion (WIM) sensors, changing site layout and adding preclearance systems. The results indicated that the addition of low-speed WIM scale with bypass lane is likely to improve efficiency of a number of existing fixed weigh stations in Michigan. Also, adding ...
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