I-255 Accident Today: Major Crash Shuts Down Eastbound Interstate in St. Louis County, Missouri
A major accident on Interstate 255 in the St. Louis, Missouri, area has caused significant traffic disruption Wednesday, September 9, 2026, after a crash shut down the eastbound lanes in St. Louis County.
The collision occurred around 2 p.m. on eastbound I-255 near the Koch Road area. Emergency crews responded to the scene, and the Missouri Department of Transportation reported that the interstate was closed while authorities worked to manage the crash and investigate what happened.
I-255 Closed After Crash
Traffic was being diverted from eastbound I-255 at Telegraph Road as emergency personnel remained at the scene. Outer Road 255 near the crash was also closed in both directions, adding to the traffic problems for motorists traveling through the area.
Images from the scene showed a tanker truck that appeared to have crashed into multiple vehicles before coming to rest near a home. Emergency responders could be seen working along both the interstate and Outer Road 255.
The exact sequence of events leading to the collision remains under investigation. Authorities had not immediately released a complete account of how the vehicles became involved or whether anyone sustained serious injuries.
Traffic Impact in St. Louis County
The closure created significant delays for drivers using I-255 and nearby roads. Motorists approaching the affected section were urged to use caution and allow additional travel time while crews worked to clear the roadway.
Because I-255 is an important route through the St. Louis metropolitan area, a major crash can quickly affect surrounding roads as drivers are diverted away from the interstate.
The closure of Outer Road 255 in both directions also added another complication for motorists attempting to bypass the main crash scene. Drivers unfamiliar with the area could experience additional delays as traffic was redirected around the emergency response.
Tanker Truck Involved in Collision
One of the most notable details from the developing investigation is the apparent involvement of a tanker truck. A photograph from the scene showed the truck after it had struck multiple vehicles and a nearby home.
At the time of the initial reports, officials had not released information establishing whether the tanker was responsible for the collision or whether another vehicle triggered the chain of events.
Investigators are expected to examine the vehicles, roadway conditions and available evidence as they work to determine the precise cause of the crash.
Investigation Continues
The I-255 accident remains an active developing incident in St. Louis County. Additional information about injuries, the number of vehicles involved, property damage and the circumstances of the collision may become available as authorities complete their investigation.
For drivers traveling through the St. Louis area, the crash serves as an immediate traffic warning, particularly for anyone planning to use eastbound I-255 near Telegraph Road, Koch Road and the surrounding exits.
As emergency crews continue clearing the scene, motorists should follow posted detours and avoid entering closed portions of the highway.
The full impact of the collision, including any injuries and the extent of damage to the vehicles and nearby property, remains subject to further official information.