road safety design standards and the asian highway network · road safety in ah network countries...
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Road safety design standardsand the Asian Highway Network
iRAP Asia Pacific WorkshopGreg Smith ([email protected])2016/05/26
A World Free of High Risk Roads
A World Free of High Risk Roads
A World Free of High Risk Roads
AH Standard Summary
While developing the Asian Highway network, Parties shall give fullconsideration to issues of safety.
A World Free of High Risk Roads
Road safety in AH Network countries
• Serious crashes tend to be concentrated. Eg 33% ofdeaths in India occur on National Highways, whichaccount 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
A World Free of High Risk Roads
Managing risk for pedestrians andbicyclists
• Pedestrian crossings with refugeislands
• Sidewalks• Pedestrian fences• Bicycle lanes• Traffic calming• Street lighting
A World Free of High Risk Roads
Managing risk for vehicle occupantsand motorcyclists
• Run-off road crashes:– Delineation– Audio-tactile lines– Forgiving roadsides (including
specialist motorcycle barrierswhere motorcycle volumes arehigh)
– Skid resistance
A World Free of High Risk Roads
Managing risk for vehicle occupantsand motorcyclists
• Head-on crashes:– Delineation– Audio-tactile lines– Skid resistance– Median treatments such as safety
barriers and wide centrelines– Overtaking lanes
A World Free of High Risk Roads
Managing risk for vehicle occupantsand motorcyclists
• Intersection and rear-endcrashes:– Delineation– Priority control– Rectification of skewed
intersections– Provision of protected turn lanes– Intersection channelization– Lighting– Skid resistance– Roundabouts– Managing gaps in medians
A World Free of High Risk Roads
Managing risk for vehicle occupantsand motorcyclists
• Exclusive and non-exclusive motorcycle lanes
A World Free of High Risk Roads
1.00
0.77
0.65
0.51
0.35
Baseline
+ improved delineation
+ shoulder rumble strips
+ roadside clearzone/barriers
+ wide centreline
Class IIRolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
2 stars 3 stars 4 stars1 star
Relative risk of vehicle occupantdeath or serious injury
A World Free of High Risk Roads
1.00
0.77
0.65
0.51
0.35
Baseline
+ improved delineation
+ shoulder rumble strips
+ roadside clearzone/barriers
+ wide centreline
2 stars 3 stars 4 stars1 star
Relative risk of vehicle occupantdeath or serious injury
Class IIRolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
A World Free of High Risk Roads
1.00
0.77
0.65
0.51
0.35
Baseline
+ improved delineation
+ shoulder rumble strips
+ roadside clearzone/barriers
+ wide centreline
2 stars 3 stars 4 stars1 star
Relative risk of vehicle occupantdeath or serious injury
Class IIRolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
A World Free of High Risk Roads
1.00
0.77
0.65
0.51
0.35
Baseline
+ improved delineation
+ shoulder rumble strips
+ roadside clearzone/barriers
+ wide centreline
2 stars 3 stars 4 stars1 star
Relative risk of vehicle occupantdeath or serious injury
Class IIRolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
A World Free of High Risk Roads
2 stars 3 stars 4 stars1 star
Relative risk of vehicle occupantdeath or serious injury
1.00
0.77
0.65
0.51
0.35
Baseline
+ improved delineation
+ shoulder rumble strips
+ roadside clearzone/barriers
+ wide centreline
Class IIRolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
A World Free of High Risk Roads
Example of vehicle occupant star ratingsL = level
R = rollingM = mountainous
S = steep
Primary Class I Class II
L R M S L R M S L R M S
Design speed (km/h) 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
2 stars 3 stars 4 stars1 star 5 stars
* Based on typical curve and intersection frequency and roadside hazards
A World Free of High Risk Roads
Example of vehicle occupant star ratingsL = level
R = rollingM = mountainous
S = steep
Primary Class I Class II
L R M S L R M S L R M S
Design speed (km/h) 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
2 stars 3 stars 4 stars1 star 5 stars
* Based on typical curve and intersection frequency and roadside hazards
A World Free of High Risk Roads
Example of vehicle occupant star ratingsL = level
R = rollingM = mountainous
S = steep
Primary Class I Class II
L R M S L R M S L R M S
Design speed (km/h) 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
2 stars 3 stars 4 stars1 star 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 countries2. Finalize list of road safety facilities3. Draft specifications for safety facilities and their
expected effect on risk (star ratings)4. Consultation with ESCAP member countries on
draft specifications, including workshop5. Revision of specifications6. Finalize specifications