Previous Chapter: References
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.

Appendix A. Practitioner Survey

University of North Carolina at Chapel Hill

Research Information Sheet IRB Study #: 23-1160

Principal Investigator: Seth LaJeunesse

The purpose of this research study is to better understand professionals’ perceptions of their professional networks, organizations, and various traffic safety practices. You are being asked to take part in this research study because you are professional whose role at least partially relates to traffic safety.

Being in a research study is completely voluntary. You can choose not to be in this research study. You can also say yes now and change your mind later. Choosing not to participate will not affect your relationship with UNC.

If you agree to take part in this research, you will be asked to complete this online survey. Your participation in this study will take about 10 minutes of your time. We expect ~400 people will take part in this research study. You can choose not to answer any question you do not wish to answer.

You can also choose to stop taking the survey at any time. You must be at least 18 years old to participate. If you are younger than 18 years old, please stop now.

The possible risks to you in taking part in this research are having someone else find out that you were in a research study and the potential loss of confidentiality of data. All data will be kept secure, but it is possible that a breach could occur. Any identifiers will be stored separately from data on password protected computers. All data and dissemination of findings will be de-identified.

The possible benefits to you for taking part in this research are indirect. Your participation does contribute to helping advance transportation safety practices and policies.

To protect your identity as a research subject, the researcher(s) will not share your information with anyone. In any publication about this research, your name or other private information will not be used.

If you have any questions about this research, please contact the Investigator named at the top of this form by calling 919-966-3133 or emailing lajeune@hsrc.unc.edu. If you have questions or concerns about your rights as a research subject, you may contact the UNC Institutional Review Board at 919-966-3113 or by email to IRB_subjects@unc.edu.

Q158 Which of the following is your primary role in transportation (select only one, your main role)

  • design of roads and streets
  • emergency management, such as EMS
  • law enforcement
  • maintenance of roads and related facilities
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
  • planning
  • policy, including transportation policy
  • public health, such as epidemiology or injury prevention
  • research
  • road and street operations
  • I have a different role: _____________________________________________________________

For how many years have you worked in this role? (Please enter a whole number [ex: 8]; and if less than 1 year, please enter “1”) ________________________________________________________________

Professional Network

We would like to learn about your professional network. Please list up to three (3) individuals outside of your workplace whose advice you seek or work you follow with respect to their work in traffic safety. These individuals can work for any type of US organization, including governmental, nonprofit, or for-profit entities. For each individual, please provide a name, organization, and city/state.

Individual 1

  • Name ________________________________________________________________________
  • Organization __________________________________________________________________
  • City, State ____________________________________________________________________

Individual 2

  • Name ________________________________________________________________________
  • Organization __________________________________________________________________
  • City, State ____________________________________________________________________

Individual 3

  • Name ________________________________________________________________________
  • Organization __________________________________________________________________
  • City, State ____________________________________________________________________

Work Situation

Which of the following best describes your work situation?

  • Self-employed
  • Work for an organization, agency, or department
  • Retired
  • Other

Where is the organization you work for located?

  • City _________________________________________________________________________
  • State ________________________________________________________________________

Where are you located?

  • City _________________________________________________________________________
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
  • State ________________________________________________________________________

Organizational Culture

This next set of items asks you to think about how things tend to be with your organization, its managers, and your coworkers. Please respond to these items as thoughtfully and honestly as you can.

Note: All items were placed on a 4-point Definitely False, Mostly False, Mostly True, Definitely True Likert scale.

  • Senior management like to keep to established, traditional ways of doing traffic safety.
  • There is talk here about how zero fatalities is impossible to achieve.
  • People here know that traffic safety mostly depends on road users being sober and alert.
  • People here believe we can build a system where no one dies.
  • Management is not interested in trying out new ideas to improve road user safety.
  • People here believe that road users are mostly responsible for their own safety.
  • Management here is quick to spot the need to do traffic safety work differently.
  • Management here often say we can reduce, but never eliminate road deaths.
  • People here are convinced that safe travel is beyond the control of individual road users.
  • People in this organization are always searching for new ways of looking at traffic safety problems.

Demographics

What is your age?

  • Under 18
  • 18–24
  • 25–34
  • 35–44
  • 45–54
  • 55–64
  • 65–74
  • 75–84
  • 85 or older

What gender do you identify as?

  • Female
  • Male
  • Non-binary/third gender
  • Prefer not to say

Which of the following best describes you?

  • American Indian or Alaska Native
  • Asian
  • Black or African American
  • Hispanic or Latinx
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
  • Native Hawaiian or Pacific Islander
  • White
  • Multiracial or Biracial
  • Other
  • Prefer not to say

If you are willing and able to participate in a virtual (online) focus group on safety practices over the next 2 months, please leave your email address below.

A member of the research team may contact you to schedule a focus group meeting within the next month.

Email: ______________________________________________________________________________

Safety Practice Prioritization

For each of the following questions, click to choose a spot on the matrix that rates practice according to their feasibility and impact.

Feasibility considers practices’ technical, political/social, budgetary, and legal constraints.

Impact considers practices’ ability to address large, trending, or urgent road safety issues.

Click the matrix for each prompt once. When you see the dot on the matrix, your response is automatically saved.

The horizontal axis moves from high feasibility (left) to low feasibility (right). The vertical axis has high impact at the top and low impact at the bottom. The image below shows what type of practice would fit in each quadrant:

Participants are also asked “Thoughts on this practice: ___________________” for each practice.

Policy

  • Establishing a default speed limit of 20 mph or lower in every business or residential district.
  • Installing seat belt interlocks in vehicles.
  • Setting posted speed limits based on harm minimization principles, road function, and severe crash types rather than an 85th percentile rule.
  • Installing LPI with right-turn-on-red restrictions in areas with high pedestrian activity.
  • Lowering the BAC limit for driving from 0.08 to 0.05.
  • Instituting immediate administrative license revocation or suspension (ALR/ALS) for alcohol- and drug-impaired driving offenses.
  • Extending GDL requirements to include all novice drivers regardless of age.
  • Installing speed governors in all municipal fleet vehicles.
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
  • Implementing speed safety cameras (automated speed enforcement) that use revenues to improve safety.
  • Instituting a driver license renewal program that requires passing an on-road driving test every 5–10 years.
  • Instituting or enforcing a statewide universal motorcycle helmet law, which would require all motorcyclists to wear US DOT compliant helmets, regardless of the rider’s age or experience.
  • Instituting or enforcing a statewide primary enforcement seat belt use law, which would require occupants to wear seatbelts in the both the front and back seats and allow law enforcement officers to ticket occupants for not wearing a seatbelt, without other citable traffic infractions taking place.
  • Establishing maximums in vehicle size (in terms of width, length, height, weight) permitted in areas with high pedestrian activity.
  • Requiring location-based speed limiters in all commercial and private vehicles in areas with high pedestrian activity.
  • Promoting the installation of technology in private automobiles that records drivers’ distraction, drowsiness, and other forms of incapacitation.
  • Developing policies requiring forward- and near-side-facing sensors on heavy vehicles to detect pedestrians and cyclists.
  • Updating NHTSA’s NCAP to include pedestrian detection and collision avoidance safety tests.
  • Requiring alcohol ignition interlocks installed for all drivers convicted of DUI.
  • Implementing red-light camera enforcement that uses revenues to fund safety infrastructure.

Planning

  • Incorporating nontraditional transportation safety data sources [e.g., EMS, hospital, social determinants of health, environmental, and historical (e.g., redlining)] as part of problem identification and project prioritization processes.
  • Simulating the safety effects of land developments and investments in long-range plans.
  • Communicating with communities not previously involved in decision-making to learn about their safety issues and concerns on a routine basis (annually, quarterly).
  • Setting a goal to reduce road deaths by 50% by 2030 in safety plans.
  • Prioritizing injury risk-based (systemic) safety assessments over crash “hot spot” or “black spot” approaches.
  • Coordinating with land use planners to align land use and roadway purposes (e.g., deciding whether the road’s purpose is access- or mobility-centered).
  • Implementing or expanding car-free zones in areas with high pedestrian activity.
  • Replacing travel forecasting (“predict and provide”) with backcasting (“decide and provide,” i.e., starting from a vision of desirable travel patterns and working backward to realize the vision).
  • Incorporating road safety audits in project scoping/planning phases.
  • Encouraging and facilitating public use of self-reporting (via mobile app or survey) to capture collisions and other events falling outside the scope of traditional crash reporting (e.g., near misses, pedestrian and bicyclist falls).
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.

Operations & Maintenance

  • Implementing VSL during adverse weather conditions.
  • Removing roadside objects that pose a danger when impacted upon a lane departure.
  • Installing LPI with right-turn-on-red restrictions in areas with high pedestrian activity.
  • Developing a TGS which details the use of specific traffic control devices (e.g., signs, barriers) during crash events.
  • Routinizing network-comprehensive (including bike and sidewalk networks) winter road clearance operations (e.g., snow and ice clearing, salt spreading where applicable).
  • Extending clearance intervals for passively detected cyclists at signalized intersections.
  • Providing longer green times for cyclists at shared path crossings.
  • Providing extended clearance intervals for passively detected pedestrians at signalized intersections.
  • Providing an exclusive signal phase for pedestrians in areas in high pedestrian volumes (e.g., pedestrian scramble or “Barnes Dance”).
  • Combining passive pedestrian detection and APS to help pedestrians with low vision safely traverse intersections.
  • Improving signal progression on designated routes for emergency vehicles with pre-determined signal linking plans.
  • Implementing VSL on roads with high pedestrian activity at certain times and high potential for significant pedestrian-motor vehicle conflicts (e.g., school zones).
  • Developing joint action plans with emergency services partners to integrate operational planning with emergency services planning.
  • Implementing DSSSs to avoid sign and signal violations and collisions.
  • Implementing VSL at nighttime in alcohol-serving districts.
  • Integrating asset management and crash analyses to determine when roadway conditions have degraded to the point that they are increasing the likelihood / severity of crashes.
  • Incorporating roadway features beyond pavement and safety infrastructure (e.g., drainage features, street furniture, vegetation) into asset management programs.
  • Including crash risk potential in prioritizations of resurfacing schedules (e.g., prioritizing surfaces with low skid resistance for resurfacing).
  • Employing an active or passive equipment maintenance and replacement system.
  • Keeping a detailed inventory on the condition of the agencies’ transportation assets (e.g., bridges, tunnels, pavements, signs, signals, sidewalks, street furniture, vegetation).
  • Implementing VSL in the vicinity of traffic incidents.

Design

  • Employing people with skills in perceptual psychology to help design “self-explaining” roads.
  • Providing pedestrian/bicycle bridges or daylit tunnels at intersections.
  • Setting default local road travel lane widths to 10 ft.
  • Installing centerline rumble strips on undivided highways.
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
  • Installing pedestrian hybrid beacons along arterials with 4+ travel lanes.
  • Installing travel lane reconfigurations (road diets) at multi-lane roads with fewer than 20,000 AADT.
  • Installing poles that break away when struck.
  • Installing cable barriers on the edges of rural roads.
  • Installing permanent barrier protected bike lanes on arterial roads.
  • Installing edge line rumble strips with bicycle gaps on undivided highways.
  • Installing raised pedestrian/bicyclist crossings at driveways, minor street intersections, and midblock transit stop locations.
  • Creating “self-explaining” road designs where local roads have narrow lanes and traffic calming; collector roads have bicycle lanes and safe pedestrian crossings; and arterial roads severely limit access and provide protected bicycle lanes and pedestrian crossings.
  • Converting conventional signalized intersections to single-lane roundabouts.
  • Installing cable barriers in the medians of rural roads.
  • Improving sight distance at intersections by restricting parking at the corners (daylighting).
  • Installing right in/right out junctions that only allow vehicles to enter and exit from the right.

Post-Crash Response

  • Forming a task force or community coalition of law enforcement, transportation, public health, members of the community, and other partners to investigate serious crashes and report findings and proposed changes to the public.
  • Developing joint action plans with emergency services partners to integrate operational planning with emergency services planning.
  • Establishing a TIM system that documents roadway and incident clearance times, as well as secondary crashes.
  • Training law enforcement and transportation staff to coordinate on post-crash reporting at crash sites.
  • Installing ACN systems on more remote, rural roadways.
  • Upgrading analog 911 infrastructure to Next Generation 911 (commonly referred to as NG911) to create a faster, more resilient system that facilitates public reporting to the 911 network.
  • Encouraging and facilitating public use of self-reporting (via mobile app or survey) to capture collisions and other events falling outside the scope of traditional crash reporting (e.g., near misses, pedestrian and bicyclist falls).
  • Deploying UAS to conduct route monitoring, crash incident verification, secondary crash detection, and response vehicle routing to and from the crash site.
  • Placing serious crashes in a time- or place-based context when engaging news media partners.
  • Instituting ACN for vehicle collisions with people walking, cycling, or rolling.
  • Linking police with EMS/hospital data for persons injured in motor vehicle crashes.

Law Enforcement

  • Instituting high-visibility saturation patrols for alcohol- or drug-impaired driving.
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
  • Requiring alcohol ignition interlocks installed for all drivers convicted of DUI.
  • Implementing red-light camera enforcement that uses revenues to improve safety.
  • Instituting or enforcing a statewide universal motorcycle helmet law, which would require all motorcyclists to wear US DOT compliant helmets, regardless of the rider’s age or experience.
  • Instituting or enforcing a statewide primary enforcement seat belt use law, which would require occupants to wear seatbelts in the both the front and back seats and allow law enforcement officers to ticket occupants for not wearing a seatbelt, without other citable traffic infractions taking place.
  • Implementing speed safety cameras (automated speed enforcement) that use revenues to fund safety infrastructure.
  • Instituting immediate administrative license revocation or suspension (ALR/ALS) for alcohol- and drug-impaired driving offenses.
  • Placing serious crashes in a time- or place-based context when engaging news media partners.
  • Encouraging and facilitating public use of self-reporting (via mobile app or survey) to capture collisions and other events falling outside the scope of traditional crash reporting (e.g., near misses, pedestrian and bicyclist falls).
  • Linking police with EMS/hospital data for persons injured in motor vehicle crashes.
  • Forming a task force or community coalition of law enforcement, transportation, public health, members of the community, and other partners to investigate serious crashes and report findings and proposed changes to the public.
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 39
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 40
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 41
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 42
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 43
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 44
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 45
Suggested Citation: "Appendix A: Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2025. Applying the Safe System Approach to Transportation Planning, Design, and Operations. Washington, DC: The National Academies Press. doi: 10.17226/29148.
Page 46
Next Chapter: Appendix B: Focus Group Protocol
Subscribe to Email from the National Academies
Keep up with all of the activities, publications, and events by subscribing to free updates by email.