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Suggested Citation:"Appendix A. Copy of Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2023. Right-Turn-on-Red Operation at Signalized Intersections with Single and Dual Right-Turn Lanes: Evaluating Performance. Washington, DC: The National Academies Press. doi: 10.17226/27264.
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Page 118
Page 119
Suggested Citation:"Appendix A. Copy of Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2023. Right-Turn-on-Red Operation at Signalized Intersections with Single and Dual Right-Turn Lanes: Evaluating Performance. Washington, DC: The National Academies Press. doi: 10.17226/27264.
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Page 119
Page 120
Suggested Citation:"Appendix A. Copy of Practitioner Survey." National Academies of Sciences, Engineering, and Medicine. 2023. Right-Turn-on-Red Operation at Signalized Intersections with Single and Dual Right-Turn Lanes: Evaluating Performance. Washington, DC: The National Academies Press. doi: 10.17226/27264.
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Page 120

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APPENDIX A. COPY OF PRACTITIONER SURVEY Iowa State University is currently conducting research for NCHRP Project 03-136 on the topic of “Evaluating the Performance of Right-Turn-On-Red Operation at Signalized Intersections.” As part of this work, we want to learn more about current practices for estimating and analyzing right-turn-on-red (RTOR) traffic. Please direct this survey to a person who is knowledgeable about the traffic signal timing procedures used by your organization (or on behalf of your clients). Estimated completion time is 5 minutes. We appreciate your participation in this voluntary survey. 1. Respondent Contact Information Name Title Organization State/Province Email Phone 2. Organization Type o State/Provincial Department of Transportation o County Highway Department (or similar) o Municipality (city/village/township) o Tribal Transportation Agency o Regional/Metropolitan Planning Agency o Tollway / Toll Bridge o Consultant o Academic/Research o Other (Please indicate) 3. What is the approximate population of your jurisdiction? 4. Which best describes your jurisdiction? o High growth o Moderate growth o Stable o Economically distressed o Mixed 118

5. Which best describes your duties within the organization? (Please mark all that apply.)  Traffic Engineering  Traffic Operations / Transportation System Management & Operations  Roadway Design  Work Zone Design  Construction Management  Roadway Maintenance  Program Management  Long-Range Planning  Other (please indicate) 6. Please indicate the approximate number of signalized intersections for which your organization manages signal timing. o None o 1-4 o 5-9 o 10-49 o 50-99 o 100-499 o 500-999 o 1000-4999 o 5000 or more 7. Each year, about what proportion of the signals are retimed? 8. When timing or retiming signals, how often is a LOS (capacity) evaluation prepared by/for your organization? About Most of half the Not Always the time time Sometimes Never applicable Retiming existing signals Adding signals to existing intersection New development 119

9. Which best describes your agency’s policy for determining RTOR proportions? o We have formal procedures, and deviations need to be justified. o We have written guidance (or guidance from another agency), but analysts can deviate from it based on their judgment. o Nothing is written down, but we have some generally-accepted practices that have developed over time. o We talk it over and make decisions on a case-by-case basis. o I'm the only person who works on this, so it's up to me to make a decision. 10. Which best describes your agency’s procedures for determining RTOR proportions?  RTOR is assumed to be zero  RTOR is based on the default values from the signal timing software  RTOR is obtained from recent traffic counts at the intersection itself  RTOR is estimated using observed RTOR from older traffic counts at the intersection itself  RTOR is estimated based on observations from similar intersections  RTOR is estimated based on the volumes for conflicting motor vehicle or pedestrian movements  RTOR is estimated based on engineering judgment and past experience 11. Which software package(s) do you typically use to establish traffic signal timings? (Please mark all that apply.)  HCS  Sidra  Synchro  Teapac  Transyt 7F  Vistro  Other (please indicate) 12. Comments / additional details 13. May we contact you for further information? o Yes o No 120

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The determination of the level-of-service (LOS) at signalized intersections is an important activity for decision-making in the allocation of resources for managing public roads, estimating the impact of new developments, and designing signal timing plans. There is a need to develop models of right-turn-on-red (RTOR) volume to permit users of the Highway Capacity Manual methodology to estimate the RTOR rather than rely on collection of field data, which often does not include RTOR as a separate quantity.

NCHRP Web-Only Document 368: Right-Turn-on-Red Operation at Signalized Intersections with Single and Dual Right-Turn Lanes: Evaluating Performance, from TRB's National Cooperative Highway Research Program, addresses these needs through the development of models for RTOR volume prediction and the development of improved guidance for whether to allow RTOR.

The document is supplemental to NCHRP Research Report 1068: Right-Turn-on-Red Site Considerations and Capacity Analysis: Practitioner's Guide.

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