TransCAD Network Settings 2017/4/17

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. 2017/4/17

To Include Link Type Codes in a Network(Trans.map) 2017/4/17

If links have cost functions that vary by link type 2017/4/17

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) 2017/4/17

To Include Turn Information in a network To specify if there are special type of link will include the turn penalty 2017/4/17

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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 2017/4/17

To Open the turn penalty Toolbox 2017/4/17

Left turn with penalties Add a Penalty Remove Panelties Left turn with penalties Apply to Network Type Penalty Value Choose Penalties Hide and Show 2017/4/17

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. 2017/4/17

To Use Centroids 2017/4/17

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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 2017/4/17

To Include Transfer Penalty Information in a Network After this, Then Create a Network File Column Penalty needed 2017/4/17

To Use Transfer Penalties Choose Penalty Column here 2017/4/17

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