Multimodal Transportation Impact Analysis for Site Development (MTIA)

ITE Releases Proposed Multimodal Transportation Impact Analysis for Site Development Recommended Practice for Comment

The purpose of the proposed Multimodal Transportation Impact Analysis for Site Development Recommended Practice (MTIASD) is to provide guidance for preparing and reviewing multimodal transportation impact analysis studies for certain types of land use changes and site developments. It also encourages consistency in planning for site access, on-site circulation and parking layouts, as well as off-site improvements for new and expanding developments. Another objective is to foster a better understanding of the multimodal transportation-related aspects of development planning by those who participate in the process.

When finalized, the MTIASD is intended to replace the current Transportation Impact Analyses for Site Development Recommended Practice, published September 2010. The MTIASD is available in the ITE Bookstore here.

As a proposed ITE Recommended Practice, ITE is seeking comments from affected individuals and organizations who have reviewed the proposed publication. Readers are encouraged to submit written or emailed suggestion(s) for improving this publication to the following no later than Thursday, January 6, 2022:

Institute of Transportation Engineers

1627 Eye Street, NW, Suite 550

Washington, DC 20006 USA


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 Analysis (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 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 proposed recommended practice in 2020.

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