InterPlan is now part of Parametrix.

During the transition, you can browse InterPlan’s past work on this website.

To learn more about Parametrix, please visit

Regional/Sub-area Plans

dixieTransportation is a regional issue, where changes in one part of the network impact others. InterPlan has unparalleled experience in running the regional travel demand model. However, even more important than the ability to run the model is the skill InterPlan staff has consistently shown in interpreting results and applying those to current issues and areas of concern.