US 31 Hamilton County Reconstruction

CHA provided program management and lead design services for the $358 million transformation and upgrade of13 miles of signalized arterial to a full freeway facility, which improved transportation on US 31 between I-465 and SR 38 in Hamilton County. Located on the north side of Indianapolis, this substantial undertaking involved the sustainable design of 46 bridges, 21 roundabouts and 11 interchanges.

The existing four-lane roadway was reconstructed as a fully access-controlled, six-lane freeway with a 55-foot median (dimensions include inside shoulders), ten new interchanges, and one redesigned interchange at I-465. Part of the reconstruction included the development of seven teardrop interchanges, with a total of 21 roundabouts, including some of the first-ever built by INDOT. The system of “back-to-back” roundabouts at 136th Street is one of the most complex series of roundabouts in the country.

Keeping safety in mind, project costs were minimized through standardizing and optimizing piers, abutments, retaining walls, drainage and contract sequencing. The reconstructed freeway reduced congestion, improved safety for motorists, and provided for the reliable and efficient movement of commerce and regional travel. The project was completed two years ahead of schedule and more than $100 million under budget.

  • 2017 ACEC Indiana Engineering Excellence Awards - Grand Project Award
  • 2016 ENR Midwest Best Project - Transportation
  • 2016 Indy Chamber Monumental Award - Engineering
Project Services:
  • Program Management
  • Design Services
  • Public Outreach
  • Environmental Impact Statement
  • Roundabout Design
  • Earthwork Calculations
  • Interchange Design
  • Traffic Design: ITS, Traffic Signals, Signing, and Pavement Design
  • Structural Design
  • Railroad Crossing Design
  • Hydraulics
  • Wetland Mitigation
  • Right-of-Way