National Academies Press: OpenBook

Roundabout Practices (2016)

Chapter: Appendix B - State Agency Questionnaire

« Previous: Appendix A - Summary of Statewide Roundabout Policies
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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Suggested Citation:"Appendix B - State Agency Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2016. Roundabout Practices. Washington, DC: The National Academies Press. doi: 10.17226/23477.
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43 APPENDIX B State Agency Questionnaire Dear AASHTO Subcommittee on Traffic Engineering Member: The Transportation Research Board (TRB) is preparing a synthesis on Roundabout Design, Operations and Safety Practices - Synthesis Topic 46-02. This is being done for NCHRP, under the sponsorship of the American Association of State Highway and Transportation Officials, in cooperation with the Federal Highway Administration. This questionnaire is being sent to the voting members of the AASHTO Subcommittee on Traffic Engineering. Your cooperation in completing the questionnaire will ensure the success of this effort. If you are not the appropriate person at your agency to complete this questionnaire, please forward it to the correct person. Please complete and submit this survey by February 9, 2015. We estimate that it should take approximately 15 minutes to complete. If you have any questions, please contact our principal investigator, Alek Pochowski, at apochowski@kittelson.com or (202) 642-2916. Any supporting materials can be sent directly to Alek Pochowski by email. QUESTIONNAIRE INSTRUCTIONS 1. To view and print the entire questionnaire, Click on the following link and print using "control p". NCHRP Synthesis Topic 46-02 Questionnaire 2. To save your partial answers and complete the questionnaire later, click on the "Save and Continue Later" link in the upper center of your screen. A link to the incomplete questionnaire will be emailed to you from SurveyGizmo. To return to the questionnaire later, open the email from SurveyGizmo and click on the link. We suggest using the “Save and Continue Later” feature if there will be more than 15 minutes of inactivity while the survey is opened, as some firewalls may terminate due to inactivity. 3. To pass a partially completed questionnaire to a colleague, click on the on the "Save and Continue Later" link in the upper center of your screen. A link to the incomplete questionnaire will be emailed to you from SurveyGizmo." Open the email from SurveyGizmo and forward it to a colleague. 4. To view and print your answers before submitting the survey, click forward to the last question, and print using “control p.” 5. To submit the survey, click on "Submit" on the last page. Thank you very much for your time and expertise. NCHRP Synthesis 46-02: Roundabout Design, Operations and Safety Practices - State Agency Questionnaire Instructions

44 Contact Information Please enter the date (MM/DD/YYYY). Calendar Please provide your contact information so we can contact you if we have questions or would like clarification about any of your responses. If more than one person helped with the questionnaire, please provide the information for the best person to contact with questions. First Name * Last Name * Title * State Agency * Street Address Apt/Suite/Office City Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan State Zip Code

45 Roundabout Definition The exhibit below provides an example of what is considered a roundabout for the purposes of this questionnaire. This definition is from NCHRP Report 672. State Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Email Address * Phone Number *

46 Number of Roundabouts Exhibit 1-1 from NCHRP Report 672, Roundabouts: An Informational Guide, Second Edition 1. Approximately what year did your state agency build its first roundabout? * Our agency has not built a roundabout Our agency has planned or designed a roundabout, but not yet built a roundabout Year *

47 The figure below provides the design characteristics of the three roundabout categories. This definition should be used for the following questions. Please note that mini-roundabouts are defined as "small roundabouts with a fully traversable central island," and are unique from neighborhood traffic calming circles. For more information on the difference between mini-roundabouts and neighborhood traffic calming circles, please see NCHRP Report 672. Exhibit 1-9 from NCHRP Report 672, Roundabouts: An Informational Guide, Second Edition Mini-Roundabouts Single-Lane Roundabouts Multilane Roundabouts Within your state By your state agency (roundabouts that your state has jurisdiction over and/or were built as part of projects overseen by your state agency) 2. By roundabout category, approximately how many roundabouts have been opened within your state and/or by your state agency (roundabouts that your state has jurisdiction over and/or were built as part of projects overseen by your state agency)? Roundabout Categories

48 Mini-Roundabouts Urban Suburban Rural Single-Lane Roundabouts Urban Suburban Rural 3. By roundabout category, approximately what proportion of mini-roundabouts are in urban, suburban and rural areas of your state? 4. By roundabout category, approximately what proportion of single-lane roundabouts are in urban, suburban and rural areas of your state? Roundabout Category by Developed Envrionments None Some Most All None Some Most All None Some Most All None Some Most All None Some Most All None Some Most All

49 Multilane Roundabouts Urban None Some Most All Suburban None Some Most All Rural None Some Most All Roundabout Database 5. By roundabout category, approximately what proportion of multilane roundabouts are in urban, suburban and rural areas of your state? 6. Do you maintain a database listing roundabouts in your state? This could refer to either all roundabouts in your state, or only roundabouts built by or under the jurisdiction of your state agency. Yes No

50 Never Seldom About half the time Usually Always Improved safety performance Shorter vehicular delays Higher capacity Lower initial capital costs Lower life-cycle costs Aesthetic/urban design improvements Responding to request from local jurisdiction Responding to request from elected official Lower speeds/traffic calming Other, please explain in the comments box Comments Roundabout Considerations Website Flyer and/or pamphlet Video Our state agency has not developed public outreach material Other, please specify * 7. Please describe the primary reasons why your agency builds roundabouts. Consider each reason and indicate the approximate frequency with which roundabouts are built. 8. Has your state agency installed a roundabout at a location that previously involved one or more fatal crashes in the before condition? Yes No Don't know 9. Please indicate the types of public outreach materials that have been developed by your state agency. Please select all that apply. Reasons for selection

51 Presentations Charts, figures, etc... on display boards Scaled plan sets with vehicle models Attendance from agency staff Attendance from roundabout design team Attendance from "high-ranking" agency official Attendance from traffic engineers involved in the project Attendance from transportation planners involved in the project Question and answer session (town hall meeting) Flyer and/or pamphlet Video Video of roundabout simulation Our state agency does not typically use public information open houses for roundabout projects Other, please specify * Roundabout Costs Approximate Planning-Level Cost Estimate Mini Roundabout Approximate Planning-Level Cost Estimate Single-Lane Roundabout 10. Please indicate the strategies typically used by your state agency at public information open houses: 11. Does your state have state statutes, codes, or laws that regulate traffic rules at roundabouts? More specifically, does your state have state statutes, codes, or laws that are only applicable to roundabouts? No Yes 12. What is the approximate planning-level cost estimate (screening or feasibility level estimate) of a mini roundabout in your state? Please limit your responses to "single-purpose" intersection projects. 13. What is the approximate planning-level cost estimate (screening or feasibility level estimate) of a single-lane roundabout in your state? Please limit your responses to "single-purpose" intersection projects.

52 Approximate Planning-Level Cost Estimate Multilane Roundabout Roundabout Performance HCM 2010 Model HCM 2010 Model calibrated to local conditions HCM 2010 Model calibrated to non-local conditions Sidra Standard Model with Environment Factor Sidra Standard Model without Environment Factor UK Equations uncalibrated UK Equations calibrated Microsimulation Other * Arcady HCS Rodel Sidra State Agency developed tool (excel spreadsheet or other, please specify) Synchro Vistro Microsimulation Other, please specify in the comments box Comments 14. What is the approximate planning-level cost estimate (screening or feasibility level estimate) of a multilane roundabout in your state? Please limit your responses to "single-purpose" intersection projects. 15. What delay/capacity model is used or permitted by your state agency to determine the operational performance of a roundabout? Please select all that apply. 16. What software tools are used by your state agency to determine the operational performance of a roundabout? Please check all that apply.

53 Case-by-case basis Practical Design policy Specific criteria, please specify the criteria * Fixed design year, please specify the design year * Fixed duration (e.g. 20 years), please specify the number of years * Never Seldom Sometimes Usually Always 5 years 10 years 20 years Over 20 years Our state does not typically estimate or predict safety at roundabouts Highway Safety Manual predictive methodology Crash Modification Factors or Crash Reduction Factors (uncalibrated) Crash Modification Factors or Crash Reduction Factors (calibrated to local conditions) Other, please specify * Roundabout Design 17. How is the design year determined? 18. Please provide us an approximation of how often the following design-year options are used. 19. How does your state estimate or predict safety at roundabouts? 20. Please indicate the extent to which your state agency uses NCHRP Report 672: Roundabouts an Informational Guide, Second Edition to provide roundabout design guidance. Our state uses NCHRP Report 672 as the only source of design guidance. Our state has developed guidance to supplement NCHRP Report 672. Please provide this supplemental guidance in the following question. Our state uses NCHRP Report 672 supplemented by material from other sources to provide design guidance. Please indicate what other material is used in the following question. Our state has developed separate guidance and does not use, or rarely uses, NCHRP Report 672. Please provide this guidance in the following question. Our state uses material from other sources, and does not use, or rarely uses, NCHRP Report 672. Please provide this material in the following question.

54 Comments Source URL (optional) Source 1 Source 2 Source 3 Source 4 Phased Implementation 21. Please upload the guidance developed by your agency, or if the material is available online, please provide the URL in the comment box. Browse... No file selectedChoose File Upload 22. Please indicate the sources used for design guidance. If the material is available online, please provide the URL (optional) of the website as well. 23. Does your state agency typically try to use a phased implementation approach to multilane roundabouts? (This could include opening a roundabout with fewer entry, circulating or exit lanes than is ultimately determined to be necessary for future conditions.) Yes No

55 Comments Comments Comments Design-Vehicle Guidance 24. Do you have criteria for determining when a phased-implementation approach should be used? Yes, please explain in the comments box No 25. Have one or more roundabouts in your state (built by your state agency or others) designed with a phased approach in mind been expanded from its opening-year configuration? Yes, please provide intersection(s) in comment box No 26. Have one or more roundabouts in your state (built by your state agency or others) been modified from its original design to address safety or operational issues? Yes, please provide intersection(s) in comment box No 27. Has your state developed guidance on the accommodation of large vehicles (trucks, emergency vehicles, farming equipment, oversize/overweight vehicles, etc...) at roundabouts? Yes No

56 Comments Comments Illumination Guidance AASHTO Roadway Lighting Design Guide IES Design Guide for Roundabout Lighting NCHRP Report 672 State-specific standard Other, please specify 28. Is the design-vehicle accommodation guidance provided in the material uploaded in question 19? No Yes, please provide the document name where we can find the information * 29. Please upload the design-vehicle guidance developed by your agency, or if the material is also available online, please provide the URL in the comment box. Browse... No file selectedChoose File Upload 30. Please upload the design-vehicle guidance developed by your agency, or if the material is also available online, please provide the URL in the comment box. Browse... No file selectedChoose File Upload 31. Does your state follow developed standards/guidance on the illumination of roundabouts? Yes No 32. What is the basis for your state's illumination standard/guidance? Please select all that apply.

57 Comments Comments States Without Roundabouts They are not part of design standards used by our agency Not sure they work efficiently Not sure they are safe Not sure that the drivers will get used to them Concerned about liability issues Other, please explain * 33. Is the illumination guidance provided in the material uploaded in question 19? No Yes, please provide the document name where we can find the information * 34. Please upload the illumination guidance developed by your agency, or if the material is also available online, please provide the URL in the comment box. Browse... No file selectedChoose File Upload 35. Please upload the illumination guidance developed by your agency, or if the material is also available online, please provide the URL in the comment box. Browse... No file selectedChoose File Upload 36. What are the major reasons why your agency has not built roundabouts on the state system?

58 Thank You! Thank you for taking our survey. Your response is very important to us. If you have additional questions or would like to follow-up on the questionnaire, please contact the Principal Investigator, Alek Pochowski at: E-mail: apochowski@kittelson.com Phone: 202-642-2916 Mailing Address: c/o Kittelson & Associates, Inc.; 300 M ST SE, Suite 810; Washington D.C. 20003 37. Is your agency considering the construction of roundabouts? Yes No

Next: Appendix C - Questionnaire Responses »
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TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 488: Roundabout Practices summarizes roundabout policies, guidance, and practices within state departments of transportation (DOTs) as of 2015. The synthesis may be used as a reference for state agencies that are creating or updating their roundabout and intersection control policies.

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