Interstate 40 westbound @ mile marker 230 - At approximately 2:45pm a vehicle traveling west lost control of their vehicle and ended up cutting off a tractor trailer and then struck the concrete divider. The tractor trailer ended up overturning and blocking all westbound lanes. Some engine fluids were also spilled and had to be cleaned up. It was a couple hours before traffic was allowed to flow, and delays extended back for several miles. Neither driver was injured in the wreck.