Project Description

During the 2017 construction season, Great Lakes Engineering Group (GLEG) worked on the US-23 Flex Route project performing as a major sub consultant based out of the MDOT Brighton TSC office.

The “flex route” or ATM (Active Traffic Management) route is a new system along 11 miles of U.S. 23 between Ann Arbor and Brighton, Michigan. It opens and closes the inside median shoulders of northbound and southbound traffic using overhead electronic signs based on traffic conditions in real time. Along with the installation of the ATM system, a full reconstruction and widening were done for the median shoulders along with drainage upgrades, freeway signing upgrades, guardrail replacement, concrete patching, and HMA cold milling and resurfacing of the existing roadway.

This project also entailed the full reconstruction of 8 Mile Road, 6 Mile Road and North Territorial Road over US-23 and US-23 over Great Lake Central Rail Road bridges. Rehabilitation work was completed on Warren and Joy Roads over US-23 and US-23 over Barker Rd bridges. Box culvert reconstruction was completed on 5-mile Road and North Territorial Road over Horseshoe Catholic Church Drain and the box culvert at US-23 over Horseshoe Lake Drain was extended.

The GLEG team provided a wide variety of inspection services on several aspects of this project including concrete and HMA paving, slope restoration, freeway signing, guardrail installation, traffic control, pavement markings, grade work, median barrier wall, pipe installation, and right-of-way fence. Bridge construction inspection was also completed and consisted of substructure and superstructure replacements, temporary and permanent widenings, EPS backfill installation, sheeting with helical tiebacks, and pile driving on both the full reconstruction and rehabilitation portions of this project, as well as box culvert construction.

Project Details

Client Michigan Department of Transportation
Location US-23 between Ann Arbor and Brighton, Michigan