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

NEPA (National Environmental Policy Act)

growth_highlandThe National Environmental Policy Act (NEPA) requires a demonstration of the purpose and need for a transportation project as well as rigorous analysis of a range of alternatives. InterPlan has been involved in many high-profile NEPA projects around Utah and has demonstrated an unmatched ability to apply the regional travel demand model to in order to assess project alternatives and solutions.