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Publication Number: FHWA-RD-97-106
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Rural Public Transportation Technologies: User Needs and Applications FR1-798APPENDIX DACCIDENT FREQUENCY DISTRIBUTIONS FOR SELECTED INTERCHANGE ELEMENTSThis appendix presents a series of accident distribution plots for camp segmens, ramps, speed-change lanes, and combinations thereof. These include:
In addition, 1-year accident (total and fatal and injury multiple-vehicle accidents) for the 551 entire ramps and the 737 ramp proper segments studied in this report are presented in figures 16 and 17, respectively, comparing the 3 years of accident data for 1993 through 1995. Figure 9. Accident Frequency Distribution for Ramp Proper Segments, Off-Ramps Only (Rear-End Accident Excluded) Figure 10. Accident Frequency Distribution for Entire Ramps, Off-Ramps Only-Ramps Only (Rear-End Accidents Excluded) Figure 11. Accident Frequency Distibutions for Speed-Change Lanes Figure 12. Accident Frequency Distributions for Entire Ramps, Including the Adjacent Speed-Change Lane Figure 13. Accident Frequency Distributions for Urban Diamond Off-Ramps Figure 14. Accident Frequency Distributions for Urban Parclo and Free-Flow Loop Off-Ramps Figure 15. Accident Frequency Distributions for Urban Outer Connection Off-Ramps Figure 16. Annual Accident Frequency Distributions for Entire Ramps (1993-1995) Figure 17. Annual Accident Frequency Distributions for Ramp Proper Segments (1993-1995) |
Topics: research, safety, design, intersection safety, speed management Keywords: research, safety, accident modeling, traffic accidents, geometric design, interchange ramps, Poisson regression, speed-change lanes TRT Terms: Traffic accidents--Statistical methods, Roads--Interchanges and intersections, Geometric design, Speed change lanes, Accident data, Regression analysis, Poisson distributions Updated: 04/12/2012
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