National Academies Press: OpenBook

Alternative Intersection Design and Selection (2020)

Chapter: Appendix D - Design Guidance and Standards for Departments of Transportation (DOTs)

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Page 177
Suggested Citation:"Appendix D - Design Guidance and Standards for Departments of Transportation (DOTs)." National Academies of Sciences, Engineering, and Medicine. 2020. Alternative Intersection Design and Selection. Washington, DC: The National Academies Press. doi: 10.17226/25812.
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Page 177
Page 178
Suggested Citation:"Appendix D - Design Guidance and Standards for Departments of Transportation (DOTs)." National Academies of Sciences, Engineering, and Medicine. 2020. Alternative Intersection Design and Selection. Washington, DC: The National Academies Press. doi: 10.17226/25812.
×
Page 178
Page 179
Suggested Citation:"Appendix D - Design Guidance and Standards for Departments of Transportation (DOTs)." National Academies of Sciences, Engineering, and Medicine. 2020. Alternative Intersection Design and Selection. Washington, DC: The National Academies Press. doi: 10.17226/25812.
×
Page 179
Page 180
Suggested Citation:"Appendix D - Design Guidance and Standards for Departments of Transportation (DOTs)." National Academies of Sciences, Engineering, and Medicine. 2020. Alternative Intersection Design and Selection. Washington, DC: The National Academies Press. doi: 10.17226/25812.
×
Page 180
Page 181
Suggested Citation:"Appendix D - Design Guidance and Standards for Departments of Transportation (DOTs)." National Academies of Sciences, Engineering, and Medicine. 2020. Alternative Intersection Design and Selection. Washington, DC: The National Academies Press. doi: 10.17226/25812.
×
Page 181

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177 A P P E N D I X D Design Guidance and Standards for Departments of Transportation (DOTs) Table D-1. DOT design guidance and standards for roundabouts State Resource Description Chapter/Section (if applicable) Reference Alabama Roundabout Planning, Design, and Operations Manual - Jones and Majeed 2015 Arkansas Roundabout Design Checklist - Arkansas Department of Transportation (DOT) n.d. Colorado Roadway Design Guide 19 (Roundabouts) Colorado DOT 2018 Delaware Design Guidance Memorandum 1-26 - Delaware DOT 2012 Georgia Construction Detail for Roundabout Landscaping Standard RA-1 Georgia DOT 2011 Georgia Construction Detail for Roundabout Typical Section Standard RA-2 Georgia DOT 2012 Georgia Design Policy Manual 8 (Roundabouts) Georgia DOT 2018a Georgia Signing and Marking Design Guidelines 13 (Roundabout Signing and Marking) Georgia DOT 2018c Indiana Indiana Design Manual 48-2.02 (Interchange Types) Indiana DOT 2013 Iowa Design Manual 6A-3 (Modern Roundabouts - General Guidance) Iowa DOT 2019

178 Alternative Intersection Design and Selection State Resource Description Chapter/Section (if applicable) Reference Kansas Kansas Roundabout Guide - Kittelson and Associates 2014 Maine Roundabout Design - French and Mousseau 2019 Maryland Roundabout Design Guidelines - Maryland DOT State Highway Administration 2011 Minnesota Minnesota DOT Road Design Manual 12 (Design Guidelines for Modern Roundabouts) Minnesota DOT 2018 Nebraska Roadway Design Manual 4 (Intersections, Driveways, and Channelization) Nebraska DOT 2018 Ohio Design Guidance 403 (Roundabouts) Ohio DOT 2019 Oregon Highway Design Manual 8.6 (Modern Roundabouts) Oregon DOT 2012 South Dakota Road Design Manual 12 (Intersections) South Dakota DOT n.d. Washington Standard Drawing for Roundabout Cement Concrete Curbs Standard Plan F-10.18-01 Washington State DOT 2017 Washington Standard Drawing for Roundabout Pavement Markings Standard Plan M-12.10-01 Washington State DOT2018 Washington Washington State DOT Design Manual 1320 (Roundabouts) Washington State DOT 2019 West Virginia Design Guide for Signing - West Virginia DOT 2018 Wisconsin Facilities Development Manual 11-26 (Roundabouts) Wisconsin DOT 2018

Design Guidance and Standards for Departments of Transportation (DOTs) 179 Table D-2. DOT design guidance and standards for superstreets State Resource Description Chapter/Section (if applicable) Reference Maryland Research Study (Developed tool to help find length for U-turn offset) - Xu et al. 2017 Minnesota Best Practices for Design and Operation - Kimley-Horn 2016 Minnesota Design and Implementation Guidance (Technical Memorandum No. 17-03-TS-01) - Minnesota DOT2017c Minnesota Pavement Marking Details - Minnesota DOT2016b Mississippi Synthesis of J-Turn Design Standards And Criteria - Mississippi DOT 2010 Missouri Engineering Policy Guide (EPG) 233.2 (At-Grade Intersections with Stop and Yield Control) Missouri DOT 2018a Missouri EPG 903.17 (Typical Signing Applications) Missouri DOT 2017 Missouri Driving simulator study of lane configuration, U-turn spacing, and signage - Sun et al. 2016, Sun et al. 2017 Missouri Guidelines for U-turn spacing and acceleration lanes - Claros, Zhu, Edara and Sun 2017 North Carolina Guidance and Layout Drawings 9-4 (Directional Crossovers with Median U-Turns) North Carolina DOT 2018a Ohio Design Guidance 404 (Restricted Crossing U-turns (RCUTs)) Ohio DOT 2019 Texas Project Report (includes Guidelines for Raised Medians) - Qi et al 2013 Wisconsin Traffic Engineering, Operations, and Safety Manual 2-15-55 (Signing for J Turns) Wisconsin DOT 2019

180 Alternative Intersection Design and Selection Table D-3. DOT design guidance and standards for diverging diamond interchanges (DDIs) State Resource Description Chapter/Section (if applicable) Reference California Guidance (Design Information Bulletin 90) - California DOT 2017 Indiana Indiana Design Manual 48-2.02 (Interchange Types) Indiana DOT2013 Minnesota DDI Design and Implementation Guidance (Technical Memorandum No. 16-07-TS-03) - Minnesota DOT 2016a Missouri EPG 234.6 (Diverging Diamond Interchanges) Missouri DOT 2019 Oregon Highway Design Manual 9 (Grade Separations & Interchanges) Oregon DOT 2012 Utah DDI Guidelines - Utah DOT 2014 Wisconsin Traffic Engineering, Operations, and Safety Manual 2-15-56 (Signing for Diverging Diamond Interchanges) Wisconsin DOT 2019

Design Guidance and Standards for Departments of Transportation (DOTs) 181 Table D-4. DOT design guidance and standards for other types of alternative intersections Intersection Type State Resource Description Chapter/Section (if applicable) Reference Continuous flow intersection (CFI) Texas Project Report (includes Guidelines for Raised Medians) - Qi et al 2013 CFI Various Project Report (includes design guidance) - Qi et al. 2018 Jughandle New Jersey Road Design Manual 6.8 (Jughandles) New Jersey DOT 2015 Median U-turn (MUT) Michigan Geometric Design Guide GEO-670-E (Crossovers) Michigan DOT 2014 MUT Texas Project Report (includes Guidelines for Raised Medians) - Qi et al 2013 Single point diamond interchange (SPDI) California Guidance (Design Information Bulletin 92) - California DOT 2018 SPDI Indiana Indiana Design Manual 48-2.02 (Interchange Types) Indiana DOT 2013 SPDI Oregon Highway Design Manual 9 (Grade Separations & Interchanges) Oregon DOT 2012 SPDI South Dakota Road Design Manual 13 (Interchanges) South Dakota DOT n.d.

Next: Appendix E - Example Flowcharts and Tables from Intersection ontrol Evaluation (ICE) Policies »
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State departments of transportation often encounter public resistance to alternative intersections, with 86% of respondents in a new survey of state DOTs agreeing or strongly agreeing that public resistance hinders their implementation. Public resistance can vary among projects based on intersection type and whether the project was initiated at the local or state level.

The TRB National Cooperative Highway Research Program's NCHRP Synthesis 550: Alternative Intersection Design and Selection documents the evaluation and selection processes within state departments of transportation (DOTs) for intersection projects.

Roundabouts are the most widely implemented type of alternative intersection. Ninety percent of state DOTs that responded to the synthesis survey reported having at least one roundabout in their jurisdiction open and operational. Roundabouts also had the highest reported number of facilities in project development as 88% of respondents indicated there was at least one roundabout under development at their DOT.

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