Technical Resources

Multimodal Transportation Impact Assessment for Site Development (MTIA)

What is the MTIA Project?

The update is designed to address areas as communities and practitioners seek guidance on how to evaluate the opportunities and constraints with innovative approaches to rethinking traditional TIASD approaches. The timing is therefore appropriate to transition from a traditional Traffic Impact Analysis to a Multimodal Transportation Impact Assessment (MTIA) Recommended Practice to update, and replace, the TIASD. The MTIA should achieve the following key objectives:

  • Broaden the understanding of strategies to help practitioners and decision makers assess the pros and cons of a variety of approaches for addressing the relationship between approval of new development and maintenance of transportation system performance;
  • Incorporate current and emerging technologies in measuring transportation systems;
  • Promote context sensitive policy and planning perspectives including impacts of land use on travel behaviors;
  • Address shift in developments from greenfields to predominately infill redevelopment;
  • Support strategies for implementing transportation systems across all modes;
  • Respond to desires for tools that better consider multimodal effects of site development; and
  • Address concerns about “free rider” and “last-in” effects of the traditional impact analysis processes.

Why Update the TIASD as the MTIA?

The MTIA idea wall at the ITE 2018 Annual Meeting and
Exhibit provided an engagement opportunity for attendees.

The purpose and need to update and replace the TIASD with MTIA is summarized in two formats from project kickoff activities in summer 2017:

A 30-member project team is in the process of developing new concepts, technical edits to the existing document, and materials for new concepts, such as pro-rata share districts.
During the 2018 ITE Annual Meeting and Exhibit, the project team hosted an idea wall to highlight some 50 proposed conceptual changes and get feedback. The idea wall can be seen to the right.
The project team is now working on specific changes to the document with an objective to deliver a completed document in the summer of 2019.

How can I get involved?

There are several ways you can help develop the Recommended Practice on Multimodal Transportation Impact Assessments for Site Development (MTIA):

  1. Submit ideas, questions, or comments to the project team leads.
  2. Join, pitch ideas, leave comments, and respond to others via Transportation Planning Council on ITE Community.
  3. Look for drafts for comment on this page as the project team moves forward.