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CONTACT INFO
CTRE
ISU Research Park
2901 S. Loop Dr.
Suite 3100
Ames, IA 50010

Phone
515-294-8103
Fax
515-294-0467

Webmaster:
mregenol@iastate.edu

Develop Bypass

After running the original mode through Tranplan to receive the loaded volumes and operating speeds, the next item is to modify the network to represent the construction of the bypass. Note, before modifying the network files in MapInfo, saving the information to a new directory with an appropriate title will help prevent future headaches.

After the base model has been validated to the ground counts, to the amount the user desires, the next step is to develop the bypass for the area and perform another run of the Tranplan software to determine the number of vehicles that would use the new bypass. This is done by first making the nodes layer editable on the map and placing new nodes at all the desired locations to complete the bypass. Then the user needs to make the links the links table editable and snap new links to the network to complete the bypass. After doing each of these things, the user needs to run the program BYPASS.MBX to update the tables with the new data for the bypass.

The following shows an example of the new bypass drawn onto the network.



At this point the user can either edit the default links attributes or continue and perform a Tranplan model run directly (done in the same fashion as shown on the previous page).

The output from running the model with the bypass is shown in the following figure.

The user should either go back to the Bypass page or to the Site Map to continue.