Introduction: The Vital Role of ASHE in Road Safety

The American Society of Highway Engineers (ASHE) has been a cornerstone of road safety advancement in the United States since its founding in 1920. As a professional organization dedicated to the design, construction, and maintenance of highways, ASHE brings together engineers, planners, educators, and policymakers to tackle one of the most pressing public safety challenges: reducing traffic fatalities and injuries. Over the past century, the Society’s work has led to significant reductions in crash rates through research, standards development, infrastructure innovation, and advocacy. This article explores the multifaceted contributions of ASHE to road safety and examines how the organization continues to shape the future of highway engineering.

Historical Background of ASHE

ASHE was established in 1920 by a group of highway engineers who recognized the need for a collaborative platform to address the rapidly growing automobile transportation system. At the time, road networks were fragmented, safety standards were virtually nonexistent, and accident rates were climbing. The founding members—drawn from state highway departments, consulting firms, and academic institutions—aimed to share knowledge, develop best practices, and influence national policy.

Over the decades, ASHE expanded its membership and influence. In the 1930s, the organization played a key role in developing the first uniform traffic control devices. During the post-World War II interstate highway boom, ASHE helped establish design standards for divided highways, guardrails, and interchanges. The Society also pioneered the use of accident data analysis to identify high-risk locations, a practice now central to highway safety management. By the 1970s, ASHE had become a leading voice in the movement toward roadside safety, advocating for clear zones, breakaway sign supports, and energy-absorbing barriers.

Today, ASHE comprises over 5,000 members across multiple sections in the United States. Its committees focus on topics such as geometric design, traffic operations, pavement safety, and technology integration. The organization continues to host annual conferences, publish technical reports, and collaborate with federal and state agencies to advance road safety.

Key Contributions to Road Safety

Research and Data Collection

ASHE has long been at the forefront of highway safety research. Through its Research Committee, the Society sponsors studies that analyze crash causes, driver behavior, road geometry, and environmental factors. One landmark project involved the development of the Highway Safety Information System (HSIS), a database that links accident reports with roadway characteristics. This resource has enabled engineers to identify patterns and prioritize safety improvements. ASHE also funds research on innovative materials—such as high-friction surface treatments and advanced pavement markings—that reduce skidding and improve visibility. By disseminating research findings through publications and workshops, the Society ensures that evidence-based practices reach practitioners nationwide.

Development of Safety Standards

ASHE has been instrumental in creating and updating the standards that govern highway safety. The Society contributes to the American Association of State Highway and Transportation Officials (AASHTO) manuals, including the Policy on Geometric Design of Highways and Streets (the “Green Book”) and the Roadside Design Guide. These documents specify minimum requirements for lane widths, shoulder dimensions, sight distances, and barrier placements. ASHE also helped shape the Manual on Uniform Traffic Control Devices (MUTCD), which sets national standards for signs, signals, and pavement markings. By participating in rulemaking processes and providing expert testimony, ASHE ensures that standards reflect the latest engineering knowledge and safety data.

Innovation in Infrastructure

From guardrail designs to intelligent traffic systems, ASHE promotes practical innovations that directly improve safety. The Society has championed the use of cable median barriers, which prevent cross-over collisions on divided highways, and the installation of rumble strips that alert distracted drivers. ASHE also supports the deployment of roundabouts, which reduce severe crashes at intersections by eliminating conflict points and lowering travel speeds. In recent years, the organization has focused on smart infrastructure—such as adaptive traffic signals, real-time warning signs, and vehicle-to-infrastructure communication—that can respond dynamically to traffic conditions. ASHE technical committees publish guidance documents on these technologies, helping agencies implement cost-effective improvements.

Education and Training of Professionals

ASHE offers a wide range of educational programs that equip highway engineers with the skills to design safer roads. The Society conducts annual conferences, regional workshops, and webinars on topics such as crash analysis, road safety audits, and work zone safety. ASHE also administers the Certified Highway Safety Professional (CHSP) credential, which validates expertise in safety engineering. Through its Young Members and Student Chapters, the organization mentors the next generation of engineers. Many state sections host local training events, such as field trips to high-crash locations and hands-on sessions with safety simulation software. This continuous learning culture ensures that ASHE members stay current with emerging practices and regulatory changes.

Policy Advocacy and Public Engagement

ASHE actively advocates for policies that prioritize safety on America’s highways. The Society lobbies for increased federal funding for highway safety programs, such as the Highway Safety Improvement Program (HSIP). ASHE also supports legislation that mandates performance-based design standards and encourages the adoption of proven countermeasures. At the state level, ASHE sections work with departments of transportation to promote the use of safety data in project selection. Additionally, the Society engages with the public through campaigns like “Buckle Up America” and “Work Zone Safety Awareness.” By elevating road safety on the national agenda, ASHE helps secure the resources and political will needed to make lasting improvements.

Measurable Impact on Road Safety

ASHE’s contributions have translated into real-world reductions in traffic fatalities and injuries. According to the National Highway Traffic Safety Administration (NHTSA), fatal crash rates per vehicle mile traveled have declined by more than 70% since the 1960s. While many factors—including vehicle design and emergency medical services—contributed to this trend, highway engineering improvements have been a critical component. States that have implemented ASHE-recommended standards, such as clear zones and median barriers, have seen crash severity drop by 30% to 50% in treated corridors. For example, a study of cable median barriers on Interstate highways found a 95% reduction in cross-median fatal collisions.

ASHE’s work on roundabouts has yielded similar results: the Insurance Institute for Highway Safety (IIHS) reports that converting an intersection from a traffic signal to a roundabout reduces injury crashes by 75% and fatal crashes by nearly 90%. The Society’s emphasis on rumble strips has also proven effective: on rural two-lane roads, centerline rumble strips cut head-on and sideswipe crashes by 25% to 50%. These statistics demonstrate that the engineering solutions promoted by ASHE deliver substantial safety benefits.

ASHE also measures its impact through the number of road safety audits (RSAs) conducted by members. Since the Society formalized its RSA training program in 2005, thousands of audits have been performed on existing and planned highways. These audits identify hazards—such as inadequate signage, poor lighting, or hidden driveways—and recommend low-cost fixes that prevent accidents. Post-audit evaluations show that implementation of RSA recommendations reduces crash frequency by an average of 20% to 30%.

Partnerships with Government Agencies

ASHE collaborates closely with the Federal Highway Administration (FHWA), state DOTs, and local transportation departments. Through these partnerships, the Society helps pilot new safety technologies, such as dynamic speed feedback signs and wrong-way driving detection systems. ASHE also participates in the FHWA’s “Every Day Counts” initiative, which accelerates the adoption of innovation. By field-testing and refining these technologies, ASHE provides real-world data that informs national guidelines.

Case Study: Pennsylvania Turnpike Safety Upgrades

In the early 2000s, the Pennsylvania Turnpike experienced a high number of fatal crashes, including several multi-vehicle pileups in fog zones. ASHE’s Pennsylvania Section worked with the Turnpike Commission to conduct a comprehensive safety analysis. The team recommended the installation of advanced fog detection sensors, variable speed limit signs, and enhanced pavement markings. After implementation, weather-related crashes dropped by 60% within the first two years. This project became a model for other toll roads across the country and is often cited in ASHE publications as a success story of engineering collaboration.

Future Directions for ASHE

Autonomous Vehicles and Connected Infrastructure

As autonomous vehicle (AV) technology matures, ASHE is adapting its focus to ensure that infrastructure supports safe AV operations. The Society is developing guidelines for dedicated AV lanes, sensor-friendly pavement markings, and reliable communication networks. ASHE also participates in pilot programs that test vehicle-to-infrastructure (V2I) communication at intersections and on bridges. By 2030, the Society aims to publish a comprehensive “Infrastructure Readiness Standard” that will help state DOTs prepare highways for a mixed fleet of human-driven and automated vehicles.

Smart Traffic Management and Data Analytics

ASHE is investing in smart traffic management systems that use artificial intelligence to predict and prevent crashes. Through its Data and Technology Committee, the Society explores applications of machine learning to analyze real-time traffic flow, weather data, and incident reports. For instance, predictive algorithms can identify locations likely to experience congestion-induced crashes and trigger automated speed reductions. ASHE also promotes the use of digital twins—virtual replicas of highways—to simulate the impact of safety interventions before construction.

Sustainability and Resilience

Future highway design must balance safety with environmental sustainability and climate resilience. ASHE is advocating for “green streets” that incorporate stormwater management, native vegetation, and reduced heat island effects without compromising safety. The Society also addresses risks from extreme weather events, such as flooding and heat-related pavement buckling, by developing design standards for resilient infrastructure. ASHE’s Sustainability Committee publishes annual reports on best practices for low-impact development and materials recycling in highway projects.

Workforce Development and Mentorship

To sustain its mission, ASHE is expanding programs to recruit and retain a diverse workforce in highway engineering. The Society partners with universities to offer scholarships, internships, and capstone projects focused on safety. ASHE also promotes mentorship circles that connect young engineers with seasoned experts. By ensuring a steady pipeline of talent, the organization will continue to drive innovation in road safety for decades to come.

Conclusion: A Legacy of Saving Lives

Since 1920, the American Society of Highway Engineers has been a driving force behind the improvements that make American roads among the safest in the world per vehicle mile traveled. Through research, standards, education, advocacy, and direct infrastructure innovations, ASHE has contributed to dramatic reductions in traffic fatalities. The organization’s work is far from finished: emerging technologies and new safety challenges—from distracted driving to autonomous vehicles—demand continued engineering ingenuity. By staying at the forefront of highway safety, ASHE ensures that the roads of tomorrow will be even safer than those of today.

For transportation professionals seeking to make a tangible difference in public safety, ASHE offers a collaborative community and a platform for impact. More information about membership, conferences, and safety resources can be found at the official ASHE website. The Society also maintains a repository of technical guidance and case studies through its technical resources page. Additional safety data and research from partner agencies are available from the Federal Highway Administration and the National Highway Traffic Safety Administration.