bahareh inanloo , berrin tansel and xia jin florida international university
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GIS-based Routing of Hazardous Material Cargoes Considering Incident Cost after Accidental Release of Chemicals. Bahareh Inanloo , Berrin Tansel and Xia Jin Florida International University Department of Civil and Environmental Engineering. Hazardous Material Cargoes. - PowerPoint PPT PresentationTRANSCRIPT
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GIS-based Routing of Hazardous Material Cargoes Considering Incident Cost after Accidental Release of Chemicals
Bahareh Inanloo, Berrin Tansel and Xia JinFlorida International UniversityDepartment of Civil and Environmental Engineering
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Introduction Objectives Assumptions Methodology Results Conclusions
Hazardous Material Cargoes
• More than 1 million hazardous material shipments are carried daily usually by trucks in the US.
• Highway crashes involving hazardous materials have a societal cost of more than $1 billion a year.
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Introduction Objectives Assumptions Methodology Results Conclusions
Hazardous Material Cargoes
• Health impact assessment of an accidental release of gasoline compounds during transport.
• Prediction of probable outcomes • Toxic vapor cloud
• Routing the hazardous cargoes in order to decrease the adverse outcomes:• Health risk caused by toxic vapor cloud inhalation.• Delay cost caused by the accident.
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Assumptions
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Introduction Objectives Assumptions Methodology Results Conclusions
Hazardous Cargo Characteristics
Non Pressure Cargo Tank MC 306 / DOT 406• Oval cross section non-pressure • Single shell aluminum construction• 9000 Gallon capacity• Transports E 10 blend of Gasoline with full capacity
• Other assumptions:
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Wind Speed(mph)
Wind direction
Temperature(F)
5 SE 55
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Introduction Objectives Assumptions Methodology Results Conclusions
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Origin and Destination of the Cargo
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Slide 5 of 18Destination
Origin Origin: Port Everglades, Hollywood, FL, USA
Destination: A gas station, Downtown, Miami, FL, USA
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Introduction Objectives Assumptions Methodology Results Conclusions
Port Everglades
Supplies about one-fifth of Florida’s energy.
Every day:
• About 12.5 million gallons of petroleum products is delivered.
• About 400,000 individual gasoline fill-ups.
Provides petroleum products to gas stations in 12 counties all over South Florida.
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Introduction Objectives Assumptions Methodology Results Conclusions
Methodology
Routing the hazardous cargoes:• Alternative routes identification• Health risk calculation• Delay cost calculation• Comparison of the routes
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Introduction Objectives Assumptions Methodology Results Conclusions
Risk Calculations
Risk according to DOT guideline:
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• Data needed:• Accident probability or frequency• Accident consequences
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Introduction Objectives Assumptions Methodology Results Conclusions
Accident Consequences, ALOHA
ALOHA (Areal Locations of Hazardous Atmospheres) An air dispersion model able to predict airborne
chemical concentrations. Inputs:
• Wind direction• Wind speed• Humidity• Date and time• Temperature• Location• Chemical characteristics
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Introduction Objectives Assumptions Methodology Results Conclusions
Accident Consequences, ALOHA
Abilities:• Sketches the impact radius • Has the ability to export the impact area to ArcMap
and MARPLOT• Considers urbanization of surrounding area by
assigning roughnessOutputs:
• Visual expression of impacted zone
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Introduction Objectives Assumptions Methodology Results Conclusions
Health Impact Area Delineation
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Health Impact IdentificationSlide 11 of 18
Routes Overall Health ImpactImpacted Population Identification
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Introduction Objectives Assumptions Methodology Results Conclusions
Risk Calculations, Accident Frequency
Accident probability or frequency:Crash Rate:
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Introduction Objectives Assumptions Methodology Results Conclusions
Crash Rate Calculations
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Truck RoutesSlide 13 of 18
Annual Average Daily TrafficCrashesCrashes Along the Routes
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Introduction Objectives Assumptions Methodology Results Conclusions
Delay Cost Calculations
Queuing analysis • Is used to calculate incident delays.• The total delay :
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• Data needed:• AADT • Road capacity• Capacity after accident
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Introduction Objectives Assumptions Methodology Results Conclusions
Delay Cost Calculations
Route Capacity Calculation
Remaining capacity
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Free-Flow Speed (mph)
Base Capacity (pc/h/ln)
75 2,400
70 2,400
65 2,350
60 2,300
55 2,250
Number of Lanes
One Lane Blocked
Two Lanes Blocked
Three Lane Blocked
2 0.35 0.00 N/A
3 0.49 0.17 0.00
4 0.58 0.25 0.13
5 0.65 0.40 0.20
6 0.71 0.50 0.26
7 0.75 0.57 0.63
8 0.78 0.63 0.41
2200
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Introduction Objectives Assumptions Methodology Results Conclusions
Route Comparison
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0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.0080
25
50
75
100
125
150
175Route_1
Route_2
Route_3
Health Risk
Dela
y Co
st ($
1000
)
Route_3
Rout
e_1
Rou
te_2
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Introduction Objectives Assumptions Methodology Results Conclusions
Concluding Points and Future Works
Prediction of health risk and delay cost. Efficiently routing hazardous material cargoes.
Future works:• Using a Multi Criteria Decision Making method.• Scheduling the tanker trucks.• To provide a network of cargo routes.• Land use specification to avoid public places.
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Thank you!
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Questions?