Transforming Transportation Transforming Transportation Pedestrian Safety and Public Transport for Pedestrian Safety and Public Transport for Vulnerable Populations, Januray 15, 2009 Vulnerable Populations, Januray 15, 2009 Infrastructure Safety Rating for Pedestrians Said Dahdah Road Safety Specialist
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Transforming TransportationTransforming TransportationPedestrian Safety and Public Transport for Vulnerable Pedestrian Safety and Public Transport for Vulnerable Populations, Januray 15, 2009Populations, Januray 15, 2009
Infrastructure Safety Rating for Pedestrians
Said Dahdah
Road Safety Specialist
System user
Problem of crashes
System designer
Problem of injury
FROM FOCUS ON CRASHESTO FOCUS ON INJURIES
Swedish Road Administration
Swedish Road Administration
Vision Zero philosophyIntegration and Separation.
1. Vulnerable road users should not be exposed to motorised vehicles at speeds exceeding 30 km/h
2. If 1. cannot be satisfied then separate or reduce vehicle speed to 30 km/h
Why 30 km/h?
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
0 10 20 30 40 50 60 70 80
Impact Speed (km/h)
Ris
k of
Ped
estr
ian
Fat
al I
njur
y
Car
LTV
Risk Concept
Risk Model for Pedestrian Crashes
Along
Crossing
Pedestrian
Likelihood
Protection
Area Factor
Likelihood
Protection
Area Factor
Likelihood of Pedestrian Crashes
• Likelihood Factor for “walking along” the road crashes =
Speed factor x Sidewalk provision factor x Side friction factor
Likelihood of Pedestrian Crashes
Likelihood of Pedestrian Crashes
• Likelihood Factor for “crossing” the road crashes =
Speed factor
x Number of lanes for use by through traffic factor