Case Study Tag: Design

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Get Involved with Transportation Research Board (TRB)

NCHRP
NCHRP and BTSCRP develop resources for DOTs, transportation professionals, and other agencies. Resources include research related to the AASHTO Highway Safety Manual and AASHTO Manual for Assessing Safety Hardware, safety guides for practitioners, and behavioral research. Transportation professionals may contribute problem statements, conduct research, and volunteer for project panels.
NCHRPBTSCRPTRIS2024 Safety Summit Poster

Data for Proactive Road Safety: Continuous Pavement Friction Measurement

Kentucky
Pavement Friction Management (PFM) using Continuous Pavement Friction Measurement (CPFM) is a proactive approach for managing pavements for safety throughout the roadway lifecycle. Taking a lifecycle approach to designing, specifying, and maintaining friction performance saved Kentucky more than $1 billion annually and reduced fatal and severe crashes by up to 24%.
FHWA Case StudyPresentation SlidesUSDOT Flyer2024 Safety Summit Poster

Pavement Marking Retroreflectivity

FHWA
The Final Rule on maintaining pavement marking retroreflectivity goes into effect September 6, 2026. Agencies can use recommended methodologies to better prioritize budgets, maximize the life of pavement markings, and improve roadway safety.
Methods ReportMUTCD 11th EditionMethodology Videos2024 Safety Summit Poster

Making Safety Everyone’s Business: Integrate Safety into All Programs and Projects

FHWA
FHWA has several resources and examples of integrating safety into all transportation projects, throughout the project lifecycle, from planning through operations and maintenance. They also have resources for organizational safety culture and programmatic safety integration.
2024 Safety Summit Poster2023 Safety Summit Poster

DelDOT’s Road Design Manual

Delaware
The DelDOT Road Design Manual includes key changes in road design practices with several new and updated policies and guidelines geared toward creating a safer, more multi-modal roadway network.
Road Design Manual Website2024 Safety Summit Poster

WISDOT’s Approach to Reducing Intersection Crashes

Wisconsin
Intersection safety improvements and data enhancements prioritized effective safety countermeasures, leading to improvements at 175 intersections.
Intersection WebpageICE ResourcesSafety Certification ProcessAASHTO Case Study

Safety Design Build 1.0 and 2.0

Missouri
Design Build 1.0 WebpageDesign Build 2.0 WebpageAASHTO ArticleAASHTO Case Study

Natural Bridge Avenue Safety Project

Missouri
The Natural Bridge Ave road diet and safety project reduced speeds by 17%, reduced all crashes by 75% and fatal pedestrian crashes by 100%.
Project WebpageAASHTO Case Study

Lane Constrictor Intersection Statewide Implementation

Minnesota
Lane constrictor intersections reduced fatal and injury crashes in Minnesota by 20%.
Traffic Safety Evaluation of Lane Constrictors ReportTRB Project PageAASHTO Case Study

MD 187 (Old Georgetown Road) Quick Build Lane Reallocation to Address Bicyclist Safety

Maryland
Lane reallocation for new bicycle lanes on MD 187 reduced bicyclist fatal and injury crashes, and improved safety for vulnerable road users.
Community Meeting PresentationProject AnnouncementReport to General AssemblyAASHTO Case Study
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