Traffic Safety Evaluation of Retroreflective Signal Backplate Borders at Signalized Intersections in Minnesota PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Traffic Safety Evaluation of Retroreflective Signal Backplate Borders at Signalized Intersections in Minnesota PDF full book. Access full book title Traffic Safety Evaluation of Retroreflective Signal Backplate Borders at Signalized Intersections in Minnesota by Max Moreland. Download full books in PDF and EPUB format.
Author: Max Moreland Publisher: ISBN: Category : Roads Languages : en Pages : 0
Book Description
Between 2016 and 2021, MnDOT installed retroreflective signal backplate borders at 116 signalized intersections in Minnesota. Retroreflective signal backplate borders are intended to further increase visibility of the signal head both during the day and at night. The goal of installing retroreflectivity to backplates is to reduce crashes at the intersection by drawing more attention to the current phase of the signal. Backplates with retroreflective borders are listed as a Federal Highway Administration Proven Safety Countermeasure with a listed safety benefit of a 15% reduction in total crashes. With the installation of retroreflective signal backplates on MnDOT signals, the changes in crash rates were not found to be statistically significantly different from similar locations that did not have retroreflective signal backplates. These results indicate there has been little impact on crash rates in the few years after the installation of retroreflective signal backplates.
Author: Max Moreland Publisher: ISBN: Category : Roads Languages : en Pages : 0
Book Description
Between 2016 and 2021, MnDOT installed retroreflective signal backplate borders at 116 signalized intersections in Minnesota. Retroreflective signal backplate borders are intended to further increase visibility of the signal head both during the day and at night. The goal of installing retroreflectivity to backplates is to reduce crashes at the intersection by drawing more attention to the current phase of the signal. Backplates with retroreflective borders are listed as a Federal Highway Administration Proven Safety Countermeasure with a listed safety benefit of a 15% reduction in total crashes. With the installation of retroreflective signal backplates on MnDOT signals, the changes in crash rates were not found to be statistically significantly different from similar locations that did not have retroreflective signal backplates. These results indicate there has been little impact on crash rates in the few years after the installation of retroreflective signal backplates.
Author: United States. Federal Highway Administration Publisher: ISBN: Category : Electronic traffic controls Languages : en Pages : 7
Book Description
"The ... case study showcases a successful and effective low-cost treatment that measurably improved safety at three signalized intersections in Columbia, South Carolina (SC). The treatment consisted of adding a retroreflective border to the existing signal backplates."--Web site.
Author: James A. Swanson Publisher: ISBN: Category : Electronic traffic controls Languages : en Pages :
Book Description
Retroreflective backplates for traffic signals have a proven record of reducing traffic accidents and, currently, all new traffic signals are designed with backplates. While including backplates in the design of new signals and support structures is straightforward, adding backplates to existing signals can be problematic as doing so increases wind loads on the signals and the supporting structures, possibly to the extent that the existing structure is not adequate. This report describes a research project centering on an examination of pertinent design standards, specifications, and typical practice, to determine if broad recommendations could be made regarding whether the addition of backplates to existing signals would be acceptable or would render existing support structures inadequate for the increased wind loads. The University of Cincinnati research team, in concert with Kittelson and Associates, Inc., performed analyses of representative mast-arm and span-wire signal support structures and was able to identify areas where standard design procedures sometimes result in conservative designs. Additionally, the research team evaluated a commercially available flexible backplate design that can potentially reduce wind loads associated with the addition of retroreflective backplates to new or existing signals. Based on these analyses, a procedure for evaluating existing signs support structures for the increased wind loads due to the addition of rigid or flexible backplates is proposed.
Author: Max Moreland Publisher: ISBN: Category : Roads Languages : en Pages : 62
Book Description
Between 2010 and 2020, 49 Reduced Conflict Intersections (RCIs) were installed on Minnesota Department of Transportation (MnDOT) roadways. The RCI is an alternative intersection layout that is intended to provide safety benefits by limiting the number of points within an intersection that two or more vehicle paths might intersect. Both a before-after analysis at RCIs and a cross-sectional analysis comparing RCIs to untreated intersections were conducted. With the installation of an RCI, both analyses yielded statistically significant decreases in fatal and serious injury crashes, angle crashes, and fatal and serious injury angle crashes. Statistically significant increases in rear-end crashes were found. Both analyses showed no significant changes to sideswipe crashes or total crashes. Based on these results, severity shift in crashes has been seen at the RCIs in Minnesota. The overall number of crashes have not changed, but the high-severity crashes have been reduced while property damage crashes have increased. The large decreases in severe crashes at RCI locations indicate the RCI can be an effective safety treatment.
Author: Max Moreland Publisher: ISBN: Category : Road markings Languages : en Pages : 0
Book Description
Between 2018 and 2019, MnDOT installed a lane constrictor design at 66 side-street, stop-controlled intersections in Minnesota. The lane constrictor design narrows the lane width for mainline approaches via a striped median with centerline rumble strips. By narrowing the mainline lane, the goal of this design is to encourage mainline traffic to slow down as it approaches the intersection. The striped median also provides greater separation between mainline directions and draws more attention to the location of the intersection. Following the installation of lane constrictors at MnDOT intersections, overall crash rates have seen little change but there have been decreases in fatal and serious injury (KA) as well as fatal and all injury (KABC) crash rates. These results indicate the addition of lane constrictors have a positive impact on crashes by reducing the severity of crashes, swapping injury crashes for property damage only crashes.
Author: ITE (Institute of Transportation Engineers) Publisher: John Wiley & Sons ISBN: 1118762304 Category : Technology & Engineering Languages : en Pages : 688
Book Description
Get a complete look into modern traffic engineering solutions Traffic Engineering Handbook, Seventh Edition is a newly revised text that builds upon the reputation as the go-to source of essential traffic engineering solutions that this book has maintained for the past 70 years. The updated content reflects changes in key industry standards, and shines a spotlight on the needs of all users, the design of context-sensitive roadways, and the development of more sustainable transportation solutions. Additionally, this resource features a new organizational structure that promotes a more functionally-driven, multimodal approach to planning, designing, and implementing transportation solutions. A branch of civil engineering, traffic engineering concerns the safe and efficient movement of people and goods along roadways. Traffic flow, road geometry, sidewalks, crosswalks, cycle facilities, shared lane markings, traffic signs, traffic lights, and more—all of these elements must be considered when designing public and private sector transportation solutions. Explore the fundamental concepts of traffic engineering as they relate to operation, design, and management Access updated content that reflects changes in key industry-leading resources, such as the Highway Capacity Manual (HCM), Manual on Uniform Traffic Control Devices (MUTCD), AASSHTO Policy on Geometric Design, Highway Safety Manual (HSM), and Americans with Disabilities Act Understand the current state of the traffic engineering field Leverage revised information that homes in on the key topics most relevant to traffic engineering in today's world, such as context-sensitive roadways and sustainable transportation solutions Traffic Engineering Handbook, Seventh Edition is an essential text for public and private sector transportation practitioners, transportation decision makers, public officials, and even upper-level undergraduate and graduate students who are studying transportation engineering.
Author: European Conference of Ministers of Transport Publisher: OECD Publishing ISBN: 9282103781 Category : Languages : en Pages : 286
Book Description
Speeding is the number one road safety problem in a large number of OECD/ECMT countries. It is responsible for around one third of the current, unacceptably high levels of road fatalities. Speeding has an impact not only on accidents but also on the ...
Author: Max Moreland
Author: Max Moreland
Author: United States. Federal Highway Administration
Author: Sunanda Dissanayake
Author: James A. Swanson
Author: Max Moreland
Author: Max Moreland
Author: Kelvin R. Santiago-Chaparro
Author: L. K. Staplin
Author: ITE (Institute of Transportation Engineers)
Author: European Conference of Ministers of Transport