Drivers who use U.S. Route 67 near West Alton are in for a long stretch of orange barrels and lane shifts, all in the name of safety. A major overhaul is under way as crews reconfigure key intersections and roll out corridor-wide upgrades aimed at slowing traffic and cutting down on serious crashes along the busy four-lane highway.
The multi-year project will reshape turning movements, add acceleration and deceleration lanes, and upgrade drainage, lighting, signage and guardrails. During construction, motorists can expect changing traffic patterns and periods where the road is narrowed to a single lane in each direction.
What MoDOT Is Building
The plan replaces several at-grade intersections with J-turns, adds an offset left-turn lane to St. Charles Street, realigns a southbound curve north of Route 94, and installs acceleration and deceleration lanes at cross streets, according to the Missouri Department of Transportation.
MoDOT says this package of improvements, along with drainage, signage, lighting and guardrail work, is designed to reduce conflict points and lessen the severity of crashes. The department projects that the J-turns will sharply reduce fatal and serious-injury crashes while also cutting total crashes along the corridor.
Why Officials Targeted This Stretch
A road-safety audit covering 2017 through 2022 recorded 227 reported crashes in the study area, including seven fatal injuries and 11 serious injuries, with roughly 65% of collisions tied to intersection movements, according to local officials.
St. Charles County reports that Route 67 carries an estimated 15,000 to 20,000 vehicles per day and that typical speeds run about 12 to 15 mph over the posted 55 mph limit. County leaders say those trends have contributed to the corridor’s high crash severity and helped drive a targeted, lower-cost strategy instead of building full interchanges at the most problematic locations.
Timeline, Contractor And What Drivers Should Expect
MoDOT kicked off the project with a June 12 groundbreaking at West Alton City Hall, 111 Richard Drive, and says preliminary work began this spring, with major construction ramping up through the summer.
The $18.4 million state-funded contract is being built by KCI Construction, and officials expect work to wrap up in spring 2028. Throughout that period, drivers will see intermittent lane reductions that pare traffic down to one lane in each direction during certain phases.
Motorists should plan for work zones that bring orange barrels, temporary access restrictions at side streets, and lower speed limits while crews are on site.
How J-Turns Change The Crash Math
J-turns, also known as restricted crossing U-turns or superstreets, eliminate direct crossing and left-turn movements from side roads. Instead, drivers on those side roads first turn right, then make a U-turn a short distance away to head in their desired direction.
That layout significantly cuts the number of conflict points at intersections. Research and state case studies show J-turns substantially reduce right-angle and other severe crashes and have become a common, cost-effective option on high-speed divided highways. Design guidance and Missouri site evaluations that informed the Route 67 project are summarized in a transportation research report on system-wide J-turn treatments.
Local Leaders Weigh In
St. Charles County Executive Steve Ehlmann has praised the investment as a much-needed step to protect residents who use the corridor every day. West Alton Mayor William “Willie” Richter pointed to repeated serious crashes as the reason local officials kept pushing for upgrades.
The county has posted project details on its website and shared the announcement and photos from the June 12 ceremony on social media, where officials have urged drivers to use caution around the work zones.
Drivers who rely on Route 67 should be ready for lane shifts, reduced speed limits and periodic changes to how they access cross streets. Local reporting and project briefings note that motorists will need to slow down and follow work-zone signage while crews rebuild key segments of the highway.
The aim, officials say, is a safer Route 67 for daily commuters, farmers and through traffic once the J-turns and related improvements are fully in place.
