CSX EthX Ethanol TransportationLT Brian Kendrick

LT Corey LeewrightLT Mike Blackman

AgendaNetwork Overview

Geographical representation of the network

Potential Operator Problem

Analysis of Network

Network Recommendations

Identifying Our Network

EthX transports ethanol throughout the eastern half of the U.S.

21 total nodes, 7 demand and 2 supply

33 arcs both directed and undirected

Demand on the network is 904 cars per day

Objective – Maximize the flow while minimizing cost

Model Assumptions

Each arc has associated cost * Cij = Cost per day for movement of 1 car along arc

Supply nodes located in areas that have the most production facilities Demand nodes are located at end points of major EthX. * Each arc has a capacity constraint Uij

Capacity on each arc is ≤ capacity of node(i)Capacities on the intermediary nodes modified to accommodate total demand on network .

* Information provided by CSX website

MAP 2

Network Legend:Green Nodes = Supply NodesYellow Nodes = IntermediariesRed Nodes = Demand Nodes

LegendLegend

Supply Nodes

Intermediary

Demand Nodes

New York Daily News 12/07/2010

26 cars out of a 131 car train derailed near Chicago. 9 of these cars were loaded with Ethanol.

Potential Operator Problem

A threat causes a delay of 12 hours but does not render this arc inoperable.

Penalty added to the overall cost to traverse the affected arc. (∑cij/m)*1.5 = 4232

A terrorist attack is an actual attack which renders the affected arc inoperable.

Zero Threats on Network

Zero Threats on Network

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-452

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65

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96

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Three Threats on Network

Three Threats on Network

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Five Threats on Network

Five Threats on Network

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One Attack on NetworkOne Attack on Network

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Two Attacks on NetworkTwo Attacks on Network

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9

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250

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Three Attacks on Network

Three Attacks on Network

0 0

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0

1000000

2000000

3000000

4000000Cost vs Number of Threats

No Threats 1 Threat 2 Threats3 Threats 4 Threats 5 ThreatsFrom node a - To node b

Cost in Dollars

0 1 2 3 4 5 6 7 8 9 100

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Cost vs Number of Interdictions

AttacksThreats

Number of Interdictions

Cost

in M

illio

ns

0 1 2 30

102030405060708090

100

Percent Demand Met

Number of Attacks

Perc

ent D

eman

d M

et

MAP 2

Recommendations-Eliminate or increase capacity at choke points-Increase the number of Supply nodes- Incorporate short lines & regional lines-Alternative means of transportation