UrbanSim

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?-UrbanSim ?????????? ?? ????.

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?????? ?? ???? UrbanSim

• ??? ??????? ???? (SELMA) ????? ????? ???????
• ????? ????? ?? ????? ???? ????"?
• ????? UrbanSim - ???? '?????' ?????? ????/??????
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• ??????? ???? ??????? ?????? ? - GIS
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Components of the Transportation / Land Use System

• Economic base theory
• Location theory
• Traffic generation and attraction models

Land Use

• Spatial interaction models
• Distance decay parameters
• Modal split

Spatial Interactions

• Traffic assignment models
• Transport capacity

Transportation Network
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Transport Model
Integrated
Land Use-
Economic Model
Modelwide Totals (emp/pop, industry production)
SPATIAL ACTIVITY
MicroSim
Simulate development actions on each parcel
Land Use Model

• Activity
• Allocation
• Industry
• Households
• Institutions

Fixed Land Use (trips/LU) Fixed Households
(trips/HH)
Trip Generation
TRANSPORT DEMAND
Spatial Input-Output Model (activity
relationships in )
Trip Distribution
Gravity model (zone size distance)
Activity/Tour Travel Model
Mode split
Simulate daily trip pattern for each person
MicroSim
Feedback-Price Signals Short term Impacts Trip
OD, mode, trip frequency
TRANSPORT SUPPLY
Assignment
Long Term Impacts land use pattern/location
choice
MicroSim
Simulate movement of individual vehicles
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Categories of Existing Models
Transportation Model
logit mode choice
basic 4-step
Tour-based
Activity-based
Aspirational
Delphi
visioning non-market based allocations linked
with price signals spatial economic
UPLAN, CUF
Land Use Model
DRAM / EMPAL
DELTA
UrbanSim
TRANUS, MEPLAN
PECAS
Oregon2
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• Access
• ArcGIS 9
• JAVA

• Data Base
• Urbansim

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• ?? 250 x 250 ?' (Grid Cell) ?????? ????, ????
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• ??? ??? (Household) ??' ?????, ?????, ??'
  ?????, ??' ?????, ???? ???' ???????.
• ????? (Job) ???, ????? ?????.

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• ????? ????? ?????? ????? ???????
• ?????? ???????? (external models)
• ?????? ??????? (internal models)
• ??? (user input) GIS ??????? ??????
• ???? ????? (Data Store)
• ??? (output) GIS ??????? ??????

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• Macro Economic Model
• ???? ?????? ?????? ???? ???????
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• Travel Demand Model System
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• Economic Demographic Transition Models ????
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• Employment / Household Mobility Model ????
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• Employment / Household Location Choice Model ????
  ????? ?????? ???????
• ???????? ?? "?????" X ?????? ????? Y
• ???????? ?? ??? ??? X ?????? ????? Y
• Discrete Choice Random Utility Maximization
  Models
• ?????

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• Employment / Household Location Choice Model ????
  ????? ?????? ???????
• ????? ?????? (Utility)

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• Developer Model ???? ????
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• Land Price Model???? ?????? ????
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• Hedonic Price Model
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• Accessibility Model ???? ???????
• ???? ?????? ?????? ???? ?? ??
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• ???? 375,000 ??' ?? 450,000 ??' ???? ????
• ????? ????? ???? 2000 ?????? ??????.

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