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From page 69... ... 67 APPENDIX A STA Survey Instrument TRADE-OFF CONSIDERATIONS IN HIGHWAY GEOMETRIC DESIGN Survey Questionnaire NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM Project 2-05, Synthesis Topic 40-07 Trade-off Considerations in Highway Geometric Design Current highway geometric design processes require establishment of fundamental design controls and selection of design criteria. The process then becomes dimensionally-based, with ranges in design values derived from tables, charts, and equations. Read the entire page →
From page 70... ... 68 • Bridge width • Structural capacity • Horizontal alignment • Vertical alignment • Grade • Stopping sight distance • Cross slope • Superelevation • Vertical clearance • Horizontal clearance (other than clear zone) Below, please provide the name and associated information of the person completing this questionnaire and, if different, someone else that may be contacted for follow-up questions: Person completing survey: ____________________________________________________________________ Contact for follow-up questions (if different) Read the entire page →
From page 71... ... 69 40 to 60% -- Environmental Clearance 80% -- Final Design 100% -- Plans, Specifications, and Estimates Please provide comments. Read the entire page →
From page 72... ... 70 Purpose and Need goal. Also, please select if the measurement of that goal is typically quantitative, qualitative, or both. Read the entire page →
From page 73... ... 71 Cost Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Environmental Issue Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Historic Impact Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Human Factors/Driver Expectancy Not Likely 1 2 3 4 5 Read the entire page →
From page 74... ... 72 6 7 8 9 10 Very Likely Operational Efficiency Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Right-of-Way Availability Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Safety Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Read the entire page →
From page 75... ... 73 Schedule Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Social Concerns Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Tort Liability Concerns Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely 11. What methodology, if any, is typically utilized to measure each of the listed trade-offs? Read the entire page →
From page 76... ... 74 Environmental Issue ____________________________________________________________________________________________ Historic Impact ____________________________________________________________________________________________ Human Factors/Driver Expectancy ____________________________________________________________________________________________ Operational Efficiency ____________________________________________________________________________________________ Right-of-Way Availability ____________________________________________________________________________________________ Safety ____________________________________________________________________________________________ Schedule ____________________________________________________________________________________________ Social Concerns ____________________________________________________________________________________________ Tort Liability Exposure ____________________________________________________________________________________________ 12. How does your agency document design decisions (beyond design exceptions) Read the entire page →
From page 77... ... 75 16. Are there any gaps, problems, or missing components in your STA's procedures and tools associated with the design selection process relative to evaluating trade-offs? Read the entire page →
From page 78... ... 76 If yes, please describe the tool/technique and how it fits into the project development process. Read the entire page →
From page 79... ... 77 25. Can you provide an example(s) Read the entire page →
From page 80... ... 78 Superelevation ___________________________________________________ Vertical Clearance ________________________________________________ Horizontal Clearance ______________________________________________ 30. Please indicate on a scale of 1 to 10 how willing your agency typically is to consider a design exception for a particular controlling criteria, with 10 being very likely to consider a design exception for the listed criteria and 1 being not likely to consider a design exception for the listed criteria. Read the entire page →
From page 81... ... 79 Bridge Width Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Structural Capacity Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Horizontal Alignment Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Vertical Alignment Not Likely 1 2 3 4 5 Read the entire page →
From page 82... ... 80 6 7 8 9 10 Very Likely Grade Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Stopping Sight Distance Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Cross Slope Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Read the entire page →
From page 83... ... 81 Superelevation Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Vertical Clearance Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Horizontal Clearance Not Likely 1 2 3 4 5 6 7 8 9 10 Very Likely Read the entire page →
From page 84... ... 82 31. For each of the controlling criteria listed, is your STA's criteria for new construction and reconstruction higher than AASHTO's (check one for each) Read the entire page →
From page 85... ... 83 Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Shoulder Width Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Bridge Width Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Structural Capacity Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Read the entire page →
From page 86... ... 84 Horizontal Alignment Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Vertical Alignment Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Grade Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Stopping Sight Distance Access Management _______________________________________________ Cost ____________________________________________________________ Read the entire page →
From page 87... ... 85 Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Cross Slope Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Superelevation Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Vertical Clearance Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Read the entire page →
From page 88... ... 86 Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ Horizontal Clearance Access Management _______________________________________________ Cost ____________________________________________________________ Environmental Issue _______________________________________________ Historic Impact ___________________________________________________ Human Factors/Driver Expectancy ___________________________________ Operational Efficiency _____________________________________________ Right-of-Way Availability __________________________________________ Safety __________________________________________________________ Schedule ________________________________________________________ Social Concerns __________________________________________________ Tort Liability Exposure ____________________________________________ 33. Please list the most common mitigation measures utilized for design exceptions of the corresponding criteria. Read the entire page →
From page 89... ... 87 Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Bridge Width Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Structural Capacity Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Horizontal Alignment Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Vertical Alignment Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Grade Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Read the entire page →
From page 90... ... 88 Stopping Sight Distance Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Cross Slope Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Superelevation Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Vertical Clearance Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Horizontal Clearance Most Common Mitigation Measure ____________________________________________________________________________________________ Mitigation Measure Impact on Acceptance of Design Exception More Likely Equally Likely Less Likely Read the entire page →
From page 91... ... 89 Future 34. Are there any plans to reevaluate how your agency evaluates trade-offs in the design selection process in the next 6 to 12 months? Read the entire page →

From page 69...

... 67 APPENDIX A STA Survey Instrument TRADE-OFF CONSIDERATIONS IN HIGHWAY GEOMETRIC DESIGN Survey Questionnaire NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM Project 2-05, Synthesis Topic 40-07 Trade-off Considerations in Highway Geometric Design Current highway geometric design processes require establishment of fundamental design controls and selection of design criteria. The process then becomes dimensionally-based, with ranges in design values derived from tables, charts, and equations.