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VMASC Nov2009 - the Virginia Modeling, Analysis and Simulation ...

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Person/Day<br />

Dmnl<br />

System Dynamics <strong>Simulation</strong> Model<br />

Normal moving<br />

in rate<br />

Effect on moving in<br />

Effect on<br />

Inmigration<br />

birth rate<br />

Equiv<br />

birth<br />

Effect on moving<br />

iout<br />

time fraction<br />

Normal moving<br />

out rate<br />

moving in<br />

Population<br />

moving out<br />

death<br />

Total travel<br />

dem<strong>and</strong><br />

life expect<br />

Average number of trips<br />

per day per capita<br />

Percent of travle satisfied<br />

by mass trasnportation<br />

Traveled distances increase<br />

due to population increase<br />

Average diastance<br />

per trip<br />

Volume of perosnal<br />

vehicles on road<br />

Percent of trvaked<br />

using car, van, truck<br />

Actual vehicles<br />

occupancy rate<br />

Vehicles<br />

ocuppancy rate<br />

Time frame<br />

New vehicle<br />

occupancy rate<br />

Volume / Capacity<br />

Total effective lane<br />

mile capacity<br />

Sub-model:<br />

Environmental<br />

Impact<br />

2<br />

1.5<br />

1<br />

0.5<br />

0<br />

Volume / Capacity<br />

0 100 200 300 400 500 600 700 800 900 1000<br />

Time (Day)<br />

"Volume / Capacity" : Current<br />

2,000<br />

1,500<br />

1,000<br />

500<br />

Effect on moving in<br />

Sub-model:<br />

Economic Impact<br />

0<br />

0 100 200 300 400 500 600 700 800 900 1000<br />

Time (Day)<br />

Effect on moving in : Current<br />

• Presented: ModSim World 2009 – <strong>Virginia</strong><br />

Beach, VA

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