I-75 / KY-3552 Interchange

The US-62 corridor in Scott County has experienced significant growth in recent years that can be attributed to Toyota Manufacturing Company, commercial developments, and residential developments. As traffic volumes have grown, congestion along the corridor has increased, resulting in longer travel times and increased delay.

In October 2013, Palmer Engineering was contracted by KYTC to develop preliminary alternatives and prepare the Interchange Justification Study for an additional interchange to be constructed on I-75 to relieve congestion along US-62 and improve the mobility along the US-62 corridor. The preferred alternative was estimated to cost $30 million.

The roadway connects to US 62 (Cherry Blossom Way) east of I-75 and KY-32 (Champion Way) west of I-75. The interchange also creates an additional interstate access point to serve Toyota Motor Manufacturing, Kentucky Inc. Three signals were designed along the New Connector Road–at KY-32, at US-62; and at I-75. As part of the coordination with FHWA, widening of I-75 created deceleration lanes and a C-D Road in the southbound direction to maintain access to the Rest Area.

As part of the alternatives development, Palmer designed two roundabouts that were located on major access roads for employees and deliveries. The dual lane roundabouts were designed to accommodate more than 2000 vehicles exiting within 30 minutes of a shift change at Toyota. As part of the design, Palmer developed VISSIM simulations to present the benefits of roundabouts compared to signalized intersections. Toyota selected the roundabouts to replace existing signals for improved traffic flow, improved safety, and lower operations and maintenance costs. The roundabouts have been operational since 2016, and traffic queueing and travel times are less than the preconstruction conditions. Accidents have also been limited.

The project involved an extensive public involvement / public awareness program to gain community support.

On August 2, 2014, KYTC issued Notice to Proceed for the Final Design of the Roadway and Structure Plans with the goal of letting the project in December 2014. Palmer Engineering met the challenge and delivered the Check Plans by August 29 and Final Plans in October 2014. The project was let to construction in December 2014, and interchange construction was completed in 2016.