Synthesis of Safety for Traffic Operations - Transports Canada

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Synthesis of Safety for Traffic Operations March 2003 Signal Control: where: N = exp(-5.46 + 0.60ln ADT main + 0.20ln ADT side – 0.40PL – 0.018LT + 0.11V + 0.026T + 0.041ND) N = annual number of crashes ADT main = Average daily traffic on the main road ADT side = Average daily traffic on the minor road PL = 0 if no protected left-turn phasing on major road; 1 otherwise LT = Proportion of minor road traffic turning left during AM and PM peak combined (%) V = grade rate for all vertical curves within 76 metres of the intersection along the main and minor roads T = Proportion of trucks entering in the AM and PM peak hours combined (%) ND = number of driveways on the major road legs within 76 metres of the intersection Region of Durham (2001) Region of Durham, Ontario Signalized Intersections Three Approaches: N = 0.0771 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.1440 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.0822 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.1390 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.0347 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.0662 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.0740 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 N = 0.1810 (AADT major + AADT minor ) 0.304 (AADT minor /(AADT minor + AADT major )) 0.157 Casualty crashes in CBD PDO crashes in CBD Casualty crashes in Suburban PDO crashes in Suburban Casualty crashes in Rural PDO crashes in Rural Casualty crashes in Semiurban PDO crashes in Semiurban Page 149
Synthesis of Safety for Traffic Operations March 2003 Four Approaches: 1.111 0.373 N = 0.00000144 AADT major AADT minor 1.111 0.373 N = 0.00000324 AADT major AADT minor 1.111 0.373 N = 0.00000126 AADT major AADT minor 1.111 0.373 N = 0.00000313 AADT major AADT minor N = 0.0000711 (AADT major + AADT minor ) b0.997 N = 0.0001570 (AADT major + AADT minor ) 0.997 N = 0.0001040 (AADT major + AADT minor ) 0.997 N = 0.0001620 (AADT major + AADT minor ) 0.997 Casualty crashes in CBD PDO crashes in CBD Casualty crashes in Semiurban PDO crashes in Semiurban Casualty crashes in Suburban PDO crashes in Suburban Casualty crashes in Rural PDO crashes in Rural Unsignalized Intersections Three Approaches: 1.021 0.219 N = 0.000003420 AADT major AADT minor 1.021 0.219 N = 0.000007890 AADT major AADT minor 1.152 0.292 N = 0.000000638 AADT major AADT minor 1.152 0.292 N = 0.000001560 AADT major AADT minor 0.598 0.484 N = 0.000041800 AADT major AADT minor 0.598 0.484 N = 0.000090300 AADT major AADT minor 1.021 0.219 N = 0.000002310 AADT major AADT minor 1.021 0.219 N = 0.000005390 AADT major AADT minor Casualty crashes in CBD PDO crashes in CBD Casualty crashes in Suburban PDO crashes in Suburban Casualty crashes in Rural PDO crashes in Rural Casualty crashes in Semiurban PDO crashes in Semiurban Four Approaches: N = 0.00317 (AADT major + AADT minor ) 0.676 (AADT minor /(AADT minor + AADT major )) 0.450 Casualty crashes in CBD N = 0.01200 (AADT major + AADT minor ) 0.676 (AADT minor /(AADT minor + AADT major )) 0.450 PDO crashes in CBD N = 0.00239 (AADT major + AADT minor ) 0.676 (AADT minor /(AADT minor + AADT major )) 0.450 Casualty crashes in Suburban N = 0.00496 (AADT major + AADT minor ) 0.676 (AADT minor /(AADT minor + AADT major )) 0.450 PDO crashes in Suburban Page 150
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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 146 and 147: Synthesis of Safety for Traffic Ope
Page 148: Chapter 9: Chapter 9: Turn Lanes Tu
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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Page 245 and 246: 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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