TDM Construction Mitigation Plan and Outreach for I-285/SR 400 Reconstruction

Project Highlights

In 2014/15 UrbanTrans created a TDM and Construction Mitigation Best Practices guide for the Atlanta Regional Commission (ARC). The guide was presented at a workshop conducted by UrbanTrans, where there was significant support to implement these best practices locally. The Best Practices guide led to the recommendation that the SR 400/I-285 reconstruction project be used as a pilot program for TDM and construction mitigation in Atlanta.

In 2015 UrbanTrans developed a TDM focused Construction Mitigation Plan for the Perimeter Community Improvement Districts (PCIDs) to mitigate the impact of the SR 400/I-285 construction project and ensure accessibility to the district, which encompasses one of the largest employment centers in the southeast. Construction of the project, which includes new flyover ramps and new collector-distributor lanes along SR 400, is expected to start in early 2017 and last 42 months.

The plan process commenced with the identification of applicable local and regional data, including travel behavior, traveler demographic data, available transportation services, and the identification of existing and planned transportation services and TDM programs and resources. Stakeholder outreach efforts included coordination with regional transportation authorities as well as local, regional, and state government.

The collected data and stakeholder feedback, along with a review of national best practices, informed TDM recommendations designed to reduce vehicle travel demand and congestion in the construction corridor and maintain access to the district. A moderate and an aggressive package were developed and modeled to estimate expected costs and benefits. The final plan was based on the aggressive package and included implementation recommendations and project costs. A key component of the plan was need for a full time staff person to solicit incentives and manage the construction specific activities. Through partnerships with MARTA, GRTA/SRTA, and Enterprise Rideshare, heavy transit and vanpool subsidies will be provided to employees within the Perimeter area.

UrbanTrans is now managing the implementation of the construction outreach strategy and developed a purposeful tiered employer structure will target companies that provide the most impact for mitigation based on employee size and proximity to transit. Implementation of the plan is expected to:

  • YEAR 1: reduce daily peak period vehicle trips by 2,051 (2.1% of all trips)
  • YEAR 4: reduce daily peak period trips by 5,402 in year 4 (5.6% of all trips)