Post on 01-Jul-2018
Road safety design standards
and the Asian Highway Network
Joint ESCAP-Korea Expressway Corporation
Seminar on Asian Highway
Greg Smith (greg.smith@irap.org)
2015/11/04
A World Free of High Risk Roads
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
A World Free of High Risk Roads
Review of standards and guides
32
62
10
11
ESCAP members with AH network
ESCAP members without AH network
ESCAP associate members
International organizations
A World Free of High Risk Roads
School zone crossing supervisor
Centreline rumble strips
Shoulder rumble strips
Service road
School zone warning
Differential speed limits
Roadworks
Vehicle parking
Facilities for motorised two wheelers
Skid resistance / grip
Sidewalk
Pedestrian fencing
Land use
Road condition
Street lighting
Speed management / traffic calming
Operating speed
Pedestrian crossing quality
Property access points
Pedestrian crossing facilities
Facilities for bicycles
Quality of curve
Paved shoulder
Median type
Roadside severity - distance
Grade
Intersection channelisation
Intersecting road volume
Delineation
Curvature
Intersection quality
Intersection type
Roadside severity - object
Number of lanes
Lane width
Speed limits
Sight distance
Number of road attribute citations
A World Free of High Risk Roads
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.”
A World Free of High Risk Roads
Managing risk for pedestrians and
bicyclists
• Pedestrian crossings with refuge islands
• Sidewalks
• Pedestrian fences
• Bicycle lanes
• Traffic calming
• Street lighting
A World Free of High Risk Roads
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
A World Free of High Risk Roads
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
A World Free of High Risk Roads
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
A World Free of High Risk Roads
Managing risk for vehicle occupants
and 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 II Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
2 stars 3 stars 4 stars 1 star
Relative risk of vehicle occupant
death 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 stars 1 star
Relative risk of vehicle occupant
death or serious injury
Class II Rolling 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 stars 1 star
Relative risk of vehicle occupant
death or serious injury
Class II Rolling 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 stars 1 star
Relative risk of vehicle occupant
death or serious injury
Class II Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
A World Free of High Risk Roads
2 stars 3 stars 4 stars 1 star
Relative risk of vehicle occupant
death 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 II Rolling terrain, design speed 60km/h
(Typical curve and intersection frequency)
A World Free of High Risk Roads
Example of vehicle occupant star ratings L = level
R = rolling
M = 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 stars 1 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 ratings L = level
R = rolling
M = 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 stars 1 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 ratings L = level
R = rolling
M = 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 stars 1 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 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