Synthesis of Safety for Traffic Operations - Transports Canada

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Synthesis of Safety for Traffic Operations March 2003 Researcher Treatment Study Methodology No. Sites CMF Comments Chin and Quddus Pretimed # Adaptive Cross-section study 52 0.87 (2001) signal timing using EB methods Removal of red/amber Applicable to Before-after study Polanis (2002) night-time flashing 19 0.27 night-time, rightangle crashes with control group operation * 90% confidence limits Page 159
Synthesis of Safety for Traffic Operations March 2003 TABLE 12.3: CMFs for Traffic Signs Researcher Treatment Study Methodology No. Sites CMF Comments Before-after study Area-wide traffic sign Lyles et al (1986) with control group -- 1.04 upgrades using crash frequency Tople (1998) TRL (2000) Arnott (1985) Tribbett et al (2000) Lalani (1991) Land Transport Safety Authority of New Zealand (1996) Helliar-Symon and Ray (1986) Kostyniuk and Cleveland (1986) Improved traffic signing Traffic signing Activated Curve Speed Warning Signs Dynamic Curve Warning Sign New chevron signs Chevron signs Active warning signs for following too close “Limited Sight Distance” sign Naïve before-after study using crash frequency Naïve before-after study using crash frequency Naïve before-after study using crash frequency Naïve before-after study of crash frequency Naïve before-after study using crash frequency Before-after study with some adjustments for crash trends Before-after study with a control group Before-after study with a control group 6 222 (Urban) 136 (Rural) 0.95 0.85 0.68 0.59 5 0.29 5 1.25 0.89 1.02 3 0.29 103 3 9 paired sites 0.52 0.46 3.31 1.32 1.09 All crashes EPDO crashes No details the signing upgrades Short after periods and no accounting for confounders Casualty crashes PDO crashes All crashes Rural areas Urban areas Close following crashes All crashes Page 160
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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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Chapter 9: Chapter 9: Turn Lanes Tu
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Turn Lanes TABLE 9.2: Safety Impact
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Turn Lanes Vogt determined that a l
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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
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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
Page 242: Appendix B: Critical R Appendix B:
Page 245 and 246: Critical Reviews Worksheet for Eval
Page 247 and 248: 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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