Traffic Capacity Level of Service: Adaptations and Usage (2025)

Chapter: Appendix A: Survey Questionnaire

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Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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APPENDIX A

Survey Questionnaire

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Page 50
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Use of L O S In or AS, Uses L O S, Does Not Use L O S, and Not Applicable. Except for the first column, all cells from the second to the fourth or last column contain check boxes. The data given in the table row-wise is as follows. Row 1: Environmental impact studies. Row 2: Greenhouse gas reductions or sustainability-focused policies. Row 3: Congestion management programs or policies. Row 4: Traffic engineering studies. Row 5: Transportation system performance monitoring. Row 6: Infrastructure evaluation criteria. Row 7: Assessment of land use projects. Row 8: Multimodal evaluation. Row 9: Transit evaluation. Row 10: Non-motorized transportation projects. Row 11: Freight transportation projects. Row 12: Intersection control evaluation (I C E). Row 13: Intersection and or roadway design. Row 14: Tool communicating impact to the public. Row 15: Assessment of user perspectives or expectations about a facility and or mode. Row 16: Safety improvements.
Page 51
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Tasks or regulations and Adopted performance measures. The table data are as follows: Environmental impact studies, Greenhouse gas reductions or sustainability focused policies, Congestion management programs or policies, Traffic engineering studies, Transportation system performance monitoring, Infrastructure evaluation criteria, Assessment of land use projects, Multimodal evaluation, Transit evaluation, Non-motorized transportation projects, Freight transportation projects, Intersection control evaluation (I C E), Intersection and or roadway design, Tool communicating impact to public, Assessment of user perspectives or expectations about a facility and or mode, Safety improvements. Every row in the Adopted Performance Measures column is blank.
Page 52
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Facility or Mode, H C M 7 (latest update), H C M 6, 2010 H C M, H C M 2000, H C M with modifications by my D O T, Does not use any manual or method (N A), Please, describe below which manual or method is used, if not the H C M. The second to seventh columns have check boxes in all cells. The cells in the eighth or last column are blank. The data given in the table row-wise are as follows: Row 1: Freeway and multilane highways: Motorized vehicle; Bicycle. Row 2: Two-lane highways: Motorized vehicle; Bicycle. Row 3: Urban street facilities and segments: Motorized vehicle; Pedestrian; Bicycle; Transit. Row 4: Signalized intersections: Motorized vehicle; Pedestrian; Bicycle. Row 5: Two-way stop-controlled intersections: Motorized vehicle; Pedestrian. Row 6: All-way stop-controlled intersections: Motorized vehicle. Row Row 7: Roundabouts: Motorized vehicle. Row 8: Ramp terminals and alternative intersections; Motorized vehicle. Row 9: Off-street pedestrian and bicycle facilities: Pedestrian; Bicycle.
Page 53
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 54
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Facility or Mode, Different L O S thresholds, Different capacity values, Different service measures, Developed extensions to the H C M methodologies, Please, describe below any other modifications that your DOT has adopted. The second to fifth columns have check boxes in all cells. The cells in the sixth or last column are blank. The data given in the table row-wise are as follows: Row 1: Freeway and multilane highways: Motorized vehicle; Bicycle. Row 2: Two-lane highways: Motorized vehicle; Bicycle. Row 3: Urban street facilities and segments: Motorized vehicle; Pedestrian; Bicycle; Transit. Row 4: Signalized intersections: Motorized vehicle; Pedestrian; Bicycle. Row 5: Two-way stop-controlled intersections: Motorized vehicle; Pedestrian. Row 6: All-way stop-controlled intersections: Motorized vehicle. Row 7: Roundabouts: Motorized vehicle. Row 8: Ramp terminals and alternative intersections: Motorized vehicle. Row 9: Off-street pedestrian and bicycle facilities: Pedestrian; Bicycle.
Page 55
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Type of Study, Peak Commute Hour, A D T, Historical A A D T, Default Peak 15-minute Period, None, Other (please, describe below). The second to sixth columns have check boxes in all cells. The cells in the seventh or last column are blank. The data given in the table row-wise are as follows: Row 1: Long-range transportation plan. Row 2: Preliminary engineering, Row 3: Alternatives analysis. Row 4: Roadway design. Row 5: Existing intersection or corridor evaluation. Row 6: Traffic impact analysis. Row 7: Multimodal study. Row 8: Transportation system performance monitoring. Row 9: Congestion management or I T S or T S M O.
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Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 57
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Tool Used, Freeway and multilane highways, Two-lane highways, Urban street facilities and segments, Signalized Intersections, Two-way Stop-controlled Intersections, All-way Stop-controlled Intersections, Roundabouts, Ramp Terminals and Alternative Intersections, Pedestrian & Bicycle Facilities. The second to ninth columns have check boxes in all cells. The data given in the table row-wise is as follows: Row 1: Sketch planning. Row 2: H C M or P P E A G computational engines. Row 3: Analytical tool (e.g., H C S, Synchro, S I D R A). Row 4: Microsimulation (e. g., V I S S I M, TransModeler). Row 5: Mesoscopic simulation. Row 6: Probe or connected vehicle data (e.g., Inrix, Here, Streetlight). Row 7: A T S P M. Row 8: Other (please describe in comments box below).
Page 58
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Tool Used, Freeway and multilane highways, Two-lane highways, Urban street facilities and segments, Signalized Intersections, Two-way Stop-controlled Intersections, All-way Stop-controlled Intersections, Roundabouts, Ramp Terminals and Alternative Intersections, Pedestrian & Bicycle Facilities. The second to ninth columns have check boxes in all cells. The data given in the table row-wise is as follows: Row 1: Sketch planning. Row 2: H C M or P P E A G computational engines. Row 3: Analytical tool (e.g., H C S, Synchro, S I D R A). Row 4: Microsimulation (e.g., V I S S I M, TransModeler). Row 5: Mesoscopic simulation. Row 6: Probe or connected vehicle data (e.g., Inrix, Here, Streetlight). Row 7: A T S P M. Row 8: Other (please describe in comments box below).
Page 59
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The column headers of the table are Method, Urban facilities, and Rural facilities. The second and third columns have check boxes in all cells. The data given in the table row-wise are as follows: Row 1: Traffic counts. Row 2: Detector data. Row 3: Connected vehicle data or probe data. Row 4: Big data or crowdsourced data. Row 5: Other (please describe in comments box below).
Page 60
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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The left section is titled ‘Tasks or regulations’ and lists the following: Environmental impact studies, Greenhouse gas reductions or sustainability focused policies, Congestion management programs or policies, Traffic engineering studies, Transportation system performance monitoring, Infrastructure evaluation criteria, Assessment of land use projects, Multimodal evaluation, Transit evaluation, Non-motorized transportation projects, Freight transportation projects, Intersection control evaluation (I C E), Intersection and or roadway design, Tool communicating impact to public, Assessment of user perspectives or expectations about a facility and or mode, Safety improvements. The right section is titled ‘Adopted Performance Measures’. Except for the header, every row in this section is blank.
Page 49
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 49
Page 50
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 50
Page 51
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 51
Page 52
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 52
Page 53
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 53
Page 54
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
Save
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Page 54
Page 55
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
Save
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Page 55
Page 56
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 56
Page 57
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 57
Page 58
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Page 58
Page 59
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
Save
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Page 59
Page 60
Suggested Citation: "Appendix A: Survey Questionnaire." National Academies of Sciences, Engineering, and Medicine. 2025. Traffic Capacity Level of Service: Adaptations and Usage. Washington, DC: The National Academies Press. doi: 10.17226/29143.
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Next Chapter: Appendix B: Survey Responses
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