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From page 43... ... 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. Read the entire page →
From page 44... ... 44 Contact Information Please enter the date (MM/DD/YYYY) Read the entire page →
From page 45... ... 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. Read the entire page →
From page 46... ... 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? Read the entire page →
From page 47... ... 47 The figure below provides the design characteristics of the three roundabout categories. This definition should be used for the following questions. Read the entire page →
From page 48... ... 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? Read the entire page →
From page 49... ... 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? Read the entire page →
From page 50... ... 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 * Read the entire page →
From page 51... ... 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) Read the entire page →
From page 52... ... 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) Read the entire page →
From page 53... ... 53 Case-by-case basis Practical Design policy Specific criteria, please specify the criteria * Fixed design year, please specify the design year * Read the entire page →
From page 54... ... 54 Comments Source URL (optional) Source 1 Source 2 Source 3 Source 4 Phased Implementation 21. Read the entire page →
From page 55... ... 55 Comments Comments Comments Design-Vehicle Guidance 24. Do you have criteria for determining when a phased-implementation approach should be used? Read the entire page →
From page 56... ... 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? Read the entire page →
From page 57... ... 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 * Read the entire page →
From page 58... ... 58 Thank You! Thank you for taking our survey. Read the entire page →

From page 43...

... 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.