A man remains in critical condition after hitting a tractor-trailer with his SUV while his two children were in the car Wednesday.

The accident took place along Route 100 in Somers just after 4 p.m. Witnesses say the SUV was heading southbound when it suddenly crossed the double yellow line, swerving into oncoming traffic and smashing into the tractor-trailer.

"The tractor-trailer did everything [it] could to avoid him," says witness Brian Weldon, of Ossining. "And then I just saw that car go into the air about 15 feet."

The SUV's driver and his children were rushed to Westchester Medical Center. The children, ages 10 and 14, were treated for minor injuries.

The tractor-trailer ended up on its side before catching fire. The driver was taken to Northern Westchester Hospital with non-life threatening injuries.

The tractor-trailer was carrying diesel fuel at the time of the crash, creating environmental concerns for authorities. State Health Department officials were able to clean up the spill, which threatened the nearby Muscoot Reservoir.

The cause of the accident is still under investigation.