[t6] irap case study 2 bangladesh

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



VEHICLE

OCCUPANTS

MOTORCYCLISTS PEDESTRIANS BICYCLISTS



Baseline Star Ratings

STAR RATINGSVEHICLE

OCCUPANTSMOTORCYCLISTS BICYCLISTS PEDESTRIANS

5

4

3

2

1



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
http://www.irap.org/http://www.irap.org/



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



INTERSECTIONS?

ALIGNMENT?

PED CROSSINGS?

SAFETY

BARRIERS

MEDIANSAFETY

BARRIERS

PAVED

SHOULDERS

NO FOOTPATHS

SERVICE ROAD

NO LIGHTING



LIGHTING

EXTRA LANES EXTRA LANES (PEDS)

INCREASED SPEED

FOOTPATH &

BICYCLE PATH

FIXED OBJECTS

MEDIANPAVED SHOULDER

INTERSECTIONS?

ALIGNMENT?

PAVEMENT

DELINEATION

PED CROSSINGS?



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.



Motorcyclists


5 0% 0%

4 0% 0%

3 13% 11%

2 26% 85%

1 61% 5%



Bicyclists


5 0% 27%

4 0% 35%

3 0% 0%

2 39% 0%

1 28% 0%

NOT RATED 34% 39%



Bicyclists

BASELINE PROPOSED



Pedestrians


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

[t6] irap case study 2 bangladesh

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