Synthesis of Safety for Traffic Operations - Transports Canada

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Synthesis of Safety for Traffic Operations March 2003 Safety Performance Functions for Intersections Ministry of Transportation for Ontario (1998) Ontario Signalized intersections Four approaches: N = 0.0002283 AADT 0.54866 for fatal crashes N = 0.0103469 AADT 0.54866 for injury crashes N = 0.0169214 AADT 0.54866 for property damage only crashes Three approaches: N = 0.0000853 AADT 0.54925 for fatal crashes N = 0.0038654 AADT 0.54925 for injury crashes N = 0.0063216 AADT 0.54925 for property damage only crashes where: N = annual number of crashes AADT = Average annual daily traffic of the main road Sayed and Rodriguez (1999) British Columbia Unsignalized intersections Four approaches: N = 1.5406 (AADT major /1000) 0.4489 (AADT minor /1000) 0.675 Three approaches: N = 0.9333 (AADT major /1000) 0.4531 (AADT minor /1000) 0.5806 where: N = Crashes per 3 years AADT major = Average annual daily traffic of the major road AADT minor = Average annual daily traffic of the minor road Page 145
Synthesis of Safety for Traffic Operations March 2003 Vogt (1999) Michigan and California For four lane main roads, with stop-controlled two-lane minor roads and three approaches: N = 0.000000192 ADT m 1.433 ADT s 0.269 exp(-0.0612M + 0.0560D) where: N = Number of crashes per year ADT m = Average two-way major road traffic per day ADT s = Average two-way side street traffic per day M = Median width on the major road (metres) D = Number of driveways on the major road within 76 metres of the intersection centre For four lane main roads, with stop-controlled two-lane minor roads and four approaches: N = 0.0000777 ADT m 0.850 ADT s 0.329 exp(0.110PL – 0.484L) where: N = Number of crashes per year ADT m = Average two-way major road traffic per day ADT s = Average two-way side street traffic per day PL = Proportion of peak hour traffic approaching on the major road that is turning left (%) L = 0 if major road has no left-turn lane; 1 if at least one left-turn lane. For the signalized intersection of two-lane roads with four approaches: N = 0.000955 ADT m 0.620 ADT s 0.395 exp(-0.0142PL s + 0.0315T) * exp( – 0.675L T + 0.130V) Page 146
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Transport Canada Transports Canada
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Synthesis Of Safety For Traffic Ope
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DISCLAIMER The material presented h
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EXECUTIVE SUMMARY Traffic operation
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Synthesis of Safety for Traffic Ope
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TABLE OF CONTENTS DISCLAIMER REJET
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LIST OF TABLES TABLE 3.1: Crash Rat
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Chapter 1: Chapter 1: Introductio I
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Introduction Before proceeding, a f
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Introduction Literature regarding t
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Introduction The current science of
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Introduction adequate size control
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Introduction In concluding this sec
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Chapter 3: Chapter 3: Intersectio I
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Intersection Control TABLE 3.3: Cra
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Intersection Control TABLE 3.5: CMF
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Intersection Control Vancouver Regi
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Intersection Control V m = the sum
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Intersection Control where: X1 = 0
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Intersection Control Region of Durh
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Intersection Control TABLE 3.17: CM
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Intersection Control The predictor
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Intersection Control program includ
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Intersection Control TABLE 3.26: Me
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Intersection Control TABLE 3.29: St
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Intersection Control TABLE 3.32: Ni
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Intersection Control It is noted th
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Intersection Control Sayed et al (1
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Intersection Control Signal Clearan
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Intersection Control The CMFs are 0
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Intersection Control also examined
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Intersection Control Shebeeb (1995)
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Intersection Control approaches at
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Intersection Control TABLE 3.56: Sa
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Chapter 5: Chapter 5: Pavement Pave
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Pavement Markings The study methodo
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Pavement Markings Hall (1987) Hall
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Pavement Markings TABLE 5.8: Safety
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Pavement Markings THIS PAGE IS INTE
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Chapter 7: Chapter 7: Bicycle Bicyc
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Bicycle Safety TABLE 7.1: Safety Im
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Page 142 and 143: Synthesis of Safety for Traffic Ope
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Page 151 and 152: Turn Lanes TABLE 9.2: Safety Impact
Page 153 and 154: Turn Lanes Vogt determined that a l
Page 155 and 156: Turn Lanes 1998 one of their high c
Page 157 and 158: Turn Lanes Section TABLE 9.10: Safe
Page 159 and 160: Turn Lanes A T = ADT 0.91 L 0.852 e
Page 161 and 162: Turn Lanes CMF = 1 - 0.7 P lt/d 0.0
Page 163 and 164: Turn Lanes occurred within 250 feet
Page 168 and 169: TABLE 10.3: Speed Changes Resulting
Page 170 and 171: Sites Where Applied 1 URBAN Island
Page 172 and 173: Forbes and Gill (2000) undertook a
Page 174 and 175: Ideally, three years of before and
Page 176 and 177: Kermit and Hein (1962) looked into
Page 178 and 179: The effects of the transverse pavem
Page 180: Chapter 11: Chapter 11: Other Other
Page 183 and 184: Other Safety Issues collisions per
Page 185 and 186: Other Safety Issues THIS PAGE IS IN
Page 220: References References
Page 223 and 224: References Bloch SA (1998) “Compa
Page 225 and 226: References Hamilton Associates (199
Page 227 and 228: References Lee JT, Maleck TL, and T
Page 229 and 230: References Polanis SF (1998) “Do
Page 231 and 232: References Vancouver, City of (1999
Page 233 and 234: References THIS PAGE IS INTENTIONAL
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Appendix B: Critical R Appendix B:
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Critical Reviews Worksheet for Eval
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Critical Reviews 2. Are the expecte
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Appendix D: Appendix D: How to Use
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How to Use Safety Performance Funct
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How to Use Safety Performance Funct
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