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7/30/2019 [T6] iRAP Case Study 2 Bangladesh
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TA-7840 BAN: Road Safety Improvement
Programs (Bangladesh)
ADB Training Course
November 2012
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A World Free of High Risk Roads
Step Date
Relationship building and training (RIOH and iRAP) 2008-2010
Anhui mission with ADB to establish road network for
assessment
Oct 2012
GRSF (Bloomberg) grant to iRAP signed Nov 2012
iRAP engage RIOH to lead in-country activities Nov 2012
Data collection (road survey, crash data, economics) and
coding by RIOH and AHAB
Dec 2012
Star Ratings, Safer Roads Investment Plan Jan-Feb 2012
Research and development Oct-Mar 2012
Reporting March 2012
Assessing Inception Report designs Oct-2012
TA-7840 BAN: Road Safety Improvement
Programs (Bangladesh)
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Example Road: N405
Upgrade to Class 1 Length: 16.6km
Traffic: 6,031 pcu
Estimated death rate:0.11 deaths per km
85th % speeds = 84km/h
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Training
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Video of road
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VEHICLEOCCUPANTS
5
4
3
2
1
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VEHICLE
OCCUPANTS
MOTORCYCLISTS PEDESTRIANS BICYCLISTS
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Baseline Star Ratings
STAR RATINGSVEHICLE
OCCUPANTSMOTORCYCLISTS BICYCLISTS PEDESTRIANS
5
4
3
2
1
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Value of human life
iRAP rule of thumb: 70 x GDP per capita
Serious injury: 0.25 x 70 x GDP per capita
Deaths:serious injuries: 1:10
On this basis for Bangladesh
Human life: 100 x 5,715 = Serious injury: 0.25 x 70 x 5,715 =
Source: McMahon, K. and Dahdah. S. (2008). The True Cost of Road Crashes:Valuing life and the cost of a serious injury. http://www.irap.org
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Countermeasure options
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STEEP SLOPE
NO SHOULDER
MEDIAN
PAVEMENT
DELINEATION
EXTRA LANES
SERVICE ROAD
NO FOOTPATHS
INTERSECTIONS?
ALIGNMENT?
PED CROSSINGS?NO LIGHTING
STAR RATING A B C
5
4
3
2
1
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INTERSECTIONS?
ALIGNMENT?
PED CROSSINGS?
SAFETY
BARRIERS
MEDIANSAFETY
BARRIERS
PAVED
SHOULDERS
NO FOOTPATHS
SERVICE ROAD
NO LIGHTING
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LIGHTING
EXTRA LANES EXTRA LANES (PEDS)
INCREASED SPEED
FOOTPATH &
BICYCLE PATH
FIXED OBJECTS
MEDIANPAVED SHOULDER
INTERSECTIONS?
ALIGNMENT?
PAVEMENT
DELINEATION
PED CROSSINGS?
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STAR RATING BASELINE PROPOSED
5 0% 0%
4 0% 2%
3 31% 89%
2 64% 6%
1 6% 4%
Vehicle occupants
Key assumptions: traffic, pedestrian and bicycle flows same as baseline; speeds = 80km/h; alignment
same as baseline; intersection and property access locations and layout same as baseline. Street
lighting poles are non-frangible; medians are not traversable with non-frangible trees; passenger-side
paved shoulders are wide, driver-side are narrow.
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Motorcyclists
STAR RATING BASELINE PROPOSED
5 0% 0%
4 0% 0%
3 13% 11%
2 26% 85%
1 61% 5%
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Bicyclists
STAR RATING BASELINE PROPOSED
5 0% 27%
4 0% 35%
3 0% 0%
2 39% 0%
1 28% 0%
NOT RATED 34% 39%
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Bicyclists
BASELINE PROPOSED
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Pedestrians
STAR RATING BASELINE PROPOSED
5 0% 0%
4 0% 0%
3 0% 0%
2 8% 97%
1 93% 4%
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Reductions in deaths and
economic assessment
DEATHS AND
SERIOUS
INJURIES
ECONOMIC COST
BASELINE
PROPOSED (CURRENT
TRAFFIC)
PROPOSED (2030 TRAFFIC)
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Countermeasures
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Vehicle occupant risk scores
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Pedestrian risk scores
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Bicyclist risk scores
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Progress
1. We have a baseline risk assessment2. We have an economic assessment
3. Star Rating feasibility road designs and suggestions forimprovement?
4. Setting performance indicators for Anhui roads?
5. Star Rating preliminary and detailed designs
6. Post construction Star Ratings