I-65/I-70 North Split Interchange

As part of the Indiana Department of Transportation’s (INDOT) plan to improve statewide and regional safety and mobility, HNTB, under a design build contract, is currently reconstructing the I-65/I-70 North Split Interchange.

Located in the heart of downtown Indianapolis, the North Split is the second-most heavily traveled interchange in the state, serving approximately 214,000 vehicles a day. Unofficially known as the “inner loop,” I-65 and I-70 are nationally significant corridors, serving the Midwest and United States in four directions.

The project calls for the reconstruction of the North Split Interchange, replacement and/or reconstruction of 32 bridges, the construction of 16 new bridges to correct deteriorated pavement conditions, reconfiguration of several critical I-65 entrance and exit ramps, and interchange operations improvements to reduce congestion.

Along with high volumes of traffic within the interchange, area motorists also experienced frequent merges, weaves, and lane changes over short distances that increased the potential for crashes, driver confusion, and disrupted traffic flow. Once completed, the reconfigured interchange will address these safety concerns by providing fewer points of conflict and allowing drivers to move in more free-flowing traffic patterns.

HNTB was the environmental and design build procurement advisor for INDOT’s North Split project. HNTB continues to provide design and construction oversight of the design build contractor on INDOT’s behalf. This role includes monitoring design and construction to ensure contract compliance, audits of the quality control/quality assurance, audits of construction scheduling and estimates, public stakeholder coordination, and traffic management plan oversight.