A Mitsubishi Eclipse veered into oncoming traffic Monday morning, slamming head-on into a truck carrying several cars.
It happened around 8:15 a.m. on Loop 1604 near Interstate 10 on the city's east side.
Loop 1604 had to be shut down for hours as crews cleared the scene.
The driver of the Eclipse was taken to a hospital via medical helicopter in critical condition.
The driver of the truck was not hurt.