Synthesis of Safety for Traffic Operations - Transports Canada
Synthesis of Safety for Traffic Operations - Transports Canada
Synthesis of Safety for Traffic Operations - Transports Canada
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<strong>Synthesis</strong> <strong>of</strong> <strong>Safety</strong> <strong>for</strong> <strong>Traffic</strong> <strong>Operations</strong> March 2003<br />
TABLE 12.4: CMFs <strong>for</strong> Pavement Markings<br />
Researcher Treatment Study Methodology No. Sites CMF Comments<br />
Naïve be<strong>for</strong>e-after<br />
196 0.70 Urban<br />
Improved markings study <strong>of</strong> crash<br />
74 0.62 Rural<br />
frequency<br />
TRL (2000)<br />
Migletz and Graham<br />
(2002)<br />
Willis et al (1984)<br />
Cottrell (1987)<br />
Hall (1987)<br />
Lee et al (1997)<br />
Retting et al (1997)<br />
Yellow bar markings<br />
Replacing conventional<br />
with longer lasting<br />
pavement markings<br />
Edgelines<br />
200 mm wide edgelines<br />
200 mm wide edgelines<br />
Reflectivity <strong>of</strong><br />
longitudinal pavement<br />
markings<br />
Placement <strong>of</strong> rightthrough<br />
arrow pavement<br />
markings in right lane<br />
near driveways<br />
Naïve be<strong>for</strong>e-after<br />
study <strong>of</strong> crash<br />
frequency<br />
Naïve be<strong>for</strong>e-after<br />
study <strong>of</strong> crash rates<br />
Be<strong>for</strong>e-after study<br />
using a control group<br />
Be<strong>for</strong>e-after study<br />
with a control group<br />
Be<strong>for</strong>e-after study<br />
with a control group<br />
2<br />
2<br />
55<br />
75<br />
Be<strong>for</strong>e-after study 46<br />
Naïve be<strong>for</strong>e-after<br />
study <strong>of</strong> conflict<br />
frequency<br />
3<br />
0.27<br />
0.63<br />
0.89<br />
1.15<br />
0.94<br />
1.02<br />
1.14<br />
No significant<br />
effect<br />
69 1.4 to 1.6<br />
3<br />
1<br />
No significant<br />
effect<br />
0.96<br />
1.06<br />
Urban<br />
Rural<br />
Dry pavement<br />
Wet pavement<br />
All crashes<br />
Visibility is cause<br />
<strong>for</strong> caution<br />
Visibility is mixed<br />
Applicable to run<strong>of</strong>f-the-road<br />
crashes<br />
Applicable to run<strong>of</strong>f-the-road<br />
crashes<br />
Applicable to<br />
night-time crashes<br />
Unsignalized<br />
driveways<br />
Signalized<br />
driveways<br />
Page 161
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