1. TransCAD
Network Settings
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2. Network Setting TransCAD supports four types of network settings:
Link type codes – When you want to use link type turn penalties or when you want the results of analytic models to be summarized by link type
Turn penalties – When you want to model the cost or delay that is associated with all turns, is based on link type, or is specifically for moving from one link to another
Centroid connectors – When your network contains centroid nodes and you want to avoid movements through those nodes.
Transfer penalties – When you want to model the cost or delay associated with transferring between different line types, such as from a rail line to a truck line.
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3. To Include Link Type Codes in a Network(Trans.map)
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4. If links have cost functions that vary by link type
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5. Turn Penalties
Most TransCAD procedures let you apply restrictions, penalties, or delays when turns are made between links in a network. Some situations when this is useful are:
Turns that are physically or legally prohibited
Signalized or congested intersections which result in delays for traffic in one or more directions
Delays that occur when there is a transition from one type of link to another (e.g., from on-ramps to a highway or at toll plazas for tunnels and bridges)
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6. To Include Turn Information in a network
To specify if there are special type of link will include the turn penalty
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8. Using the Turn Penalty Toolbox
TransCAD provides tools to help you create and edit specific turn penalty tables. With these tools, you can:
Create a specific turn penalty table
Display specific turn penalties on a map
Interactively add, edit, and delete specific turn penalties
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9. To Open the turn penalty Toolbox
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10. Left turn with penalties
Add a Penalty
Remove Panelties
Left turn with penalties
Apply to Network
Type Penalty Value
Choose Penalties
Hide and Show
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11. Centroids
Centroids are special nodes in a network that represent the center of a transportation analysis zone. In many transportation forecasting applications, trip either start or end at centroids. You identify centroids by creating a selection set. The links that connect centroids to the other links in a network are known as centroid connectors.
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12. To Use Centroids
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14. Transfer Penalties
In some networks, there is a cost associated with changing from traveling on one line type to another. For example:
When freight is transferred from one mode to another, a cost or delay is incurred
Transferring from a ramp to a highway can cause a delay and may involve a cost
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15. To Include Transfer Penalty Information in a Network
After this, Then Create a Network File
Column Penalty needed
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16. To Use Transfer Penalties
Choose Penalty Column here
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