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Handling large amounts of data in VISSIM

Transportforum Linköping 2011

by Martin Holmstedt

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Handling large amounts of data in VISSIMIllustrated through the project Kungens Kurva (Kings Bend) in Stockholm

Picture space – Select Insert Picture (from file)

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Background

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Background

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Route Choice

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Route Entry Tip• Add Routes from the first zone to all other zones

• Then add a red marker for each zone.

• Open the input file in your favourite text editor and scroll to the route section.

• Strip out everything except the route number, destination link and fraction.

•Paste the whole block under each of the routing decisions.

• Open the file in VISSIM and run. VISSIM will then generate a route for each OD in the model based on the shortest path.

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Route Choice - COM

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Route Choice - COM

vehinput.AttValue("VOLUME") = InputValue

decision.AttValue2("RELATIVEFLOW", RouteIndex, I) = InputValue

p. 88

p. 103

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Traffic Generation

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Mapping The Counts

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Index

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Matrix development – Furness Method

Seed Matrix Input and output totals

Row totals divided according to seed matrix

Column totals divided according to seed matrix

Basic Conditions informning input matrix:

• No internal trips

• Relationships between zones

• Known turning ratios

• Impossible movements

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Matrix development – Furness Method

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Route Diagram

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Matrix Development Iteration

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Validation Difficulties

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Summary

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Questions