Road safety design standards and the Asian Highway Network

Road safety design standards
and the Asian Highway Network
Joint ESCAP-Korea Expressway Corporation
Seminar on Asian Highway
Greg Smith ([email protected])
2015/11/04
By 2020, halve the number of
global deaths and injuries from
road traffic accidents
A World Free of High Risk Roads
A World Free of High Risk Roads
A World Free of High Risk Roads
A World Free of High Risk Roads
Road safety in AH Network countries
• Serious crashes tend to be concentrated. Eg 33% of
deaths in India occur on National Highways, which
account for around 3% of roads
• High death rates on some road sections:
– 0.42 deaths /km /year in Bangladesh
– 0.61 deaths /km /year in Indonesia
– 1.9 deaths /km /year in India
• By comparison:
– 0.07 deaths /km /year: highest risk road in the UK
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Review of standards and guides
11
10
32
62
ESCAP members with AH network
ESCAP members without AH network
ESCAP associate members
International organizations
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Number of road attribute citations
Sight distance
Speed limits
Lane width
Number of lanes
Roadside severity - object
Intersection type
Intersection quality
Curvature
Delineation
Intersecting road volume
Intersection channelisation
Grade
Roadside severity - distance
Median type
Paved shoulder
Quality of curve
Facilities for bicycles
Pedestrian crossing facilities
Property access points
Pedestrian crossing quality
Operating speed
Speed management / traffic calming
Street lighting
Road condition
Land use
Pedestrian fencing
Sidewalk
Skid resistance / grip
Facilities for motorised two wheelers
Vehicle parking
Roadworks
Differential speed limits
School zone warning
Service road
Shoulder rumble strips
Centreline rumble strips
School zone crossing supervisor
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
A World Free of High Risk Roads
“THE CONTINUED PRESENCE OF
OBSOLETE AND DEADLY FORMS
OF TERMINAL TREATMENT,
INCLUDING … TURNED DOWN
ENDS, SHOULD BE A CONCERN TO
ROAD AUTHORITIES
EVERYWHERE.”
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Managing risk for pedestrians and
bicyclists
• Pedestrian crossings with refuge
islands
• Sidewalks
• Pedestrian fences
• Bicycle lanes
• Traffic calming
• Street lighting
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Managing risk for vehicle occupants
and motorcyclists
• Run-off road crashes:
– Delineation
– Audio-tactile lines
– Forgiving roadsides (including
specialist motorcycle barriers
where motorcycle volumes are
high)
– Skid resistance
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Managing risk for vehicle occupants
and motorcyclists
• Head-on crashes:
–
–
–
–
Delineation
Audio-tactile lines
Skid resistance
Median treatments such as safety
barriers and wide centrelines
– Overtaking lanes
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Managing risk for vehicle occupants
and motorcyclists
• Intersection and rear-end
crashes:
– Delineation
– Priority control
– Rectification of skewed
intersections
– Provision of protected turn lanes
– Intersection channelization
– Lighting
– Skid resistance
– Roundabouts
– Managing gaps in medians
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Managing risk for vehicle occupants
and motorcyclists
• Exclusive and non-exclusive motorcycle lanes
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Class II
Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
Relative risk of vehicle occupant
death or serious injury
1.00
Baseline
+ improved delineation
0.77
+ shoulder rumble strips
0.65
+ roadside clearzone/barriers
+ wide centreline
1 star
A World Free of High Risk Roads
2 stars
0.51
0.35
3 stars
4 stars
Class II
Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
Relative risk of vehicle occupant
death or serious injury
1.00
Baseline
+ improved delineation
0.77
+ shoulder rumble strips
0.65
+ roadside clearzone/barriers
+ wide centreline
1 star
A World Free of High Risk Roads
2 stars
0.51
0.35
3 stars
4 stars
Class II
Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
Relative risk of vehicle occupant
death or serious injury
1.00
Baseline
+ improved delineation
0.77
+ shoulder rumble strips
0.65
+ roadside clearzone/barriers
+ wide centreline
1 star
A World Free of High Risk Roads
2 stars
0.51
0.35
3 stars
4 stars
Class II
Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
Relative risk of vehicle occupant
death or serious injury
1.00
Baseline
+ improved delineation
0.77
+ shoulder rumble strips
0.65
+ roadside clearzone/barriers
+ wide centreline
1 star
A World Free of High Risk Roads
2 stars
0.51
0.35
3 stars
4 stars
Class II
Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
Relative risk of vehicle occupant
death or serious injury
1.00
Baseline
+ improved delineation
0.77
+ shoulder rumble strips
0.65
+ roadside clearzone/barriers
+ wide centreline
1 star
A World Free of High Risk Roads
2 stars
0.51
0.35
3 stars
4 stars
Example of vehicle occupant star ratings
L = level
R = rolling
M = mountainous
S = steep
Primary
Design speed (km/h)
Class I
Class II
L
R
M
S
L
R
M
S
L
R
M
S
120
100
80
60
100
80
50
50
80
60
50
40
Baseline *
+ delineation
+ rumble strips
+ roadside clearzone/barriers
+ median treatment
+ int. quality
+ int. lighting
+ protected turn lanes
+ chanelization
1 star
2 stars
3 stars
4 stars
5 stars
* Based on typical curve and intersection frequency and roadside hazards
A World Free of High Risk Roads
Example of vehicle occupant star ratings
L = level
R = rolling
M = mountainous
S = steep
Primary
Design speed (km/h)
Class I
Class II
L
R
M
S
L
R
M
S
L
R
M
S
120
100
80
60
100
80
50
50
80
60
50
40
Baseline *
+ delineation
+ rumble strips
+ roadside clearzone/barriers
+ median treatment
+ int. quality
+ int. lighting
+ protected turn lanes
+ chanelization
1 star
2 stars
3 stars
4 stars
5 stars
* Based on typical curve and intersection frequency and roadside hazards
A World Free of High Risk Roads
Example of vehicle occupant star ratings
L = level
R = rolling
M = mountainous
S = steep
Primary
Design speed (km/h)
Class I
Class II
L
R
M
S
L
R
M
S
L
R
M
S
120
100
80
60
100
80
50
50
80
60
50
40
Baseline *
+ delineation
+ rumble strips
+ roadside clearzone/barriers
+ median treatment
+ int. quality
+ int. lighting
+ protected turn lanes
+ chanelization
1 star
2 stars
3 stars
4 stars
5 stars
* Based on typical curve and intersection frequency and roadside hazards
A World Free of High Risk Roads
A World Free of High Risk Roads
Next steps
1. Survey of ESCAP member countries
2. Finalize list of road safety facilities
3. Draft specifications for safety facilities and their
expected effect on risk (star ratings)
4. Consultation with ESCAP member countries on
draft specifications, including workshop
5. Revision of specifications
6. Finalize specifications
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