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US-23 Flex Route Phase 2 - Livingston County

US-23 Flex Route photo showing the gantries and flex speed limits.
Department of Transportation

US-23 Flex Route Phase 2 - Livingston County

About this project

MDOT is constructing Phase 2 of the US-23 Flex Route from south of M-36 to I-96. A flex route uses a lane control system that includes cameras and electronic message boards to let drivers know when the shoulder is available for use during morning and afternoon peak travel periods. Once complete, the US-23 Flex Route will extend from M-14 to I-96. 

Safety benefit: A performance and safety study was completed to formally examine the first phase of the flex route from M-14 to north of 8 Mile Road. The study found that significant safety improvements are expected by extending the US-23 Flex Route to I-96. MDOT anticipates that overall crashes will be reduced by 34 percent with the implementation of the flex route system along the US-23 corridor.

Project details

Spring 2023 - 2026

Livingston County

Increased safety
Reduced crashes

Phase 2 Cost
$162 million

Jack Rick, Project Manager
MDOT Brighton TSC

Phase 2

Investment: $162 Million

What is Being Done
MDOT will be extending the US-23 Flex Route from north of 8 Mile Road to I-96. The US-23 Flex Route Phase 2 extension focuses on traffic safety, operations, infrastructure condition, and the directional peak period congestion along the US-23 corridor.


Phase 2 - Presentation

Phase 2 - Noise Report

Phase 2 - Final Alternatives Analysis Report

Phase 1 - Completed

Investment: $125 Million

What Was Done (2016-2017)
MDOT built the first Flex Route on US-23 between M-14 and 8 Mile Road in 2016 and 2017. The US-23 Flex Route project involved installing an active traffic management (ATM) lane with other safety improvements, as well as operational improvements and addressing condition needs.


Phase 1 - US-23 ATM Performance and Safety Evaluation

Phase 1 - Environmental Clearance Study Information

Additional information

The US-23 work in Livingston County is part of Gov. Gretchen Whitmer’s Rebuilding Michigan program to rebuild the state highways and bridges that are critical to the state's economy and carry the most traffic. The investment strategy is aimed at fixes that result in longer useful lives and improves the condition of the state's infrastructure.