Safety Impacts of Intersection Sight Distance (2018) / Chapter Skim
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Pages 87-93
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From page 87... ...
NCHRP 17-59 87 CHAPTER 4: CONCLUSIONS, RECOMMENDATIONS, AND SUGGESTED RESEARCH CONCLUSIONS AND RECOMMENDATIONS This study included 832 minor road stop-controlled intersection approaches, which were approximately evenly selected across North Carolina, Ohio, and Washington. The selected sites represent a wide variety of area types, geometric conditions, and traffic volumes and were selected independent of crash history.
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From page 88... ...
NCHRP 17-59 88 number of crashes to changes in ISD increases as both traffic volume and speed limit increase. CMFunctions for each of the target crash types were estimated using the regression models.
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From page 89... ...
NCHRP 17-59 89 to the guidance document for the full results when the volume is known. The description of the CMF in the guidance must emphasize that the CMF is applicable for an approach direction calculation and applies to rural, two-lane highways; rural, multilane highways; and urban streets.
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From page 90... ...
NCHRP 17-59 90 SUGGESTED FUTURE RESEARCH The following topics were identified for future ISD research: Future research should consider the difference in crash modification factors for intersections that have higher ISD-related crash counts. It is likely that intersections with histories of higher ISD-related crash counts will benefit further from changes to available ISD.
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From page 91... ...
NCHRP 17-59 91 REFERENCES AASHO. A Policy on Geometric Design of Rural Highways.
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From page 92... ...
NCHRP 17-59 92 Easa, S
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From page 93... ...
NCHRP 17-59 93 Mounce, J
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