Selecting Ramp Design Speeds, Volume 2: Conduct of Research Report (2021) / Chapter Skim
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Pages 87-92
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87 Section 5. Summary of Design Guidelines This section summarizes guidelines for selecting appropriate ramp design speeds.
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88 Table 29. Range of Guide Values for Ramp Design Speed as Related to Highway Design Speed, Interchange Type, Ramp Configuration, and Contextual Considerations Context Ramp configuration Highway design speed (mph)
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89 first, and then the design speeds of the other elements or segments of the ramp proper should be determined accordingly. It is desirable (but not essential)
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90 Figure 23. Acceleration of Passenger Cars, Level Condition (AASHTO, 2018)
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91 Green Book Tables 10-4 and 10-6, presented here as Tables 30 and 31 respectively, have been adapted slightly based on this research. The column headings were adapted to be more consistent with the enhanced design guidelines.
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92 Table 31. Minimum Deceleration Lengths for Exit Terminals with Flat Grades of Two Percent or Less (adapted from AASHTO, 2018)
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