Glossary of Regional Transportation Systems Management and Operations Terms

Neudorff, L G; Mason, J M; Bauer, Jocelyn

doi:10.17226/22040

Cited by 3 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Benefits of Advanced Traffic Management Solutions: Before and After Crash Analysis for Deployment of a Variable Advisory Speed Limit System

Chambers

View full text Add to dashboard Cite

Variable speed limit (VSL) systems are important active traffic management tools that are being deployed across the U.S. and indeed around the world for relieving congestion and improving safety. Oregon's first variable advisory speed limit signs were activated along Oregon Highway 217 in the summer of 2014. The variable advisory speed system is responsive to both congestion and weather conditions. This seven-mile corridor stretches around Western Portland and has suffered from high crash rates and peak period congestion in the past. VSL systems are often deployed to address safety, mobility and sustainability related performance. This research seeks to determine whether the newly implemented variable advisory speed limit system has had measurable impacts on traffic safety and what the scale of the impact has been. The research utilizes a beforeafter crash analysis with three years of data prior to implementation and around 16 months after. Statistical analysis using an Empirical Bayes (EB) approach will aim to separate the direct impacts of the variable advisory speed limit signs from the long term trends on the highway. In addition, the analysis corrects for the changes in traffic volumes over the study period. Three data sources will be utilized including Washington County 911 call data, Oregon incident reports, and official Oregon Department of Transportation crash data reports. The analysis v results are compared between data sources to determine the reliability of 911 call data as a proxy for crash statistics. The conclusions should be able to provide an indication of whether variable advisory speed limits can provide increased safety along high crash corridors.

show abstract

Benefits of Advanced Traffic Management Solutions: Before and After Crash Analysis for Deployment of a Variable Advisory Speed Limit System

Chambers

View full text Add to dashboard Cite

show abstract

Evaluating the Effects of a Congestion and Weather Responsive Advisory Variable Speed Limit System in Portland, Oregon

Downey¹

2000

View full text Add to dashboard Cite

Barriers to Municipal Planning for Pedestrians and Bicyclists in North Carolina

Evenson¹,

Aytur²,

Satinsky³

et al. 2011

North Carolina Medical Journal

View full text Add to dashboard Cite

background The Guide to Community Preventive Services recommends implementing community-and street-scale urban design, as well as land use policies and practices, to promote walking and bicycling. To better understand barriers to municipal walking and bicycling projects and policies, we surveyed municipal staff in North Carolina. methods We surveyed all 121 municipalities with at least 5,000 persons, and 62% responded. We also surveyed 216 of 420 municipalities with less than 5,000 persons, and 50% responded. The municipal staff member most knowledgeable about walking and bicycling planning was asked to complete the survey. Responses were weighted to account for the sampling design, to reflect prevalence estimates for all North Carolina municipalities. results Common barriers to walking and bicycling projects and policies were selected from a 14-item list. For walking, barriers included lack of funding (93% of responding municipalities), other infrastructure priorities (79%), automobile infrastructure priorities (66%), and staffing challenges (65%). For bicycling, barriers included lack of funding (94% of responding municipalities), other infrastructure priorities (79%), automobile infrastructure priorities (73%), issues were not high priorities for the municipality (68%), staffing challenges (68%), and insufficient support from residents (63%). Barriers generally were more prevalent among rural municipalities than among urban municipalities (9 of 14 barriers for walking and 5 of 14 for bicycling; P < .10). limitations The study relied on 1 respondent to report for a municipality. Additionally, job titles of respondents varied with municipality size. conclusions Health professionals and multidisciplinary partners can assist in overcoming the common local-and state-level barriers to walking and bicycle projects and policies that are reported by North Carolina municipalities.

show abstract

Glossary of Regional Transportation Systems Management and Operations Terms

Cited by 3 publications

References 0 publications

Benefits of Advanced Traffic Management Solutions: Before and After Crash Analysis for Deployment of a Variable Advisory Speed Limit System

Benefits of Advanced Traffic Management Solutions: Before and After Crash Analysis for Deployment of a Variable Advisory Speed Limit System

Evaluating the Effects of a Congestion and Weather Responsive Advisory Variable Speed Limit System in Portland, Oregon

Barriers to Municipal Planning for Pedestrians and Bicyclists in North Carolina

Contact Info

Product

Resources

About