A teenage getaway driver with a 12-year-old people smuggler crashed off the road and drove up a huge ramp before rolling onto an interstate after being chased by cops.

The 15-year-old human smuggler was chased by a Texas Department of Public Safety vehicle on the I-35 in Frio County, in the US state of Texas, on Wednesday.

As the teenager approached a key junction, he apparently lost control in the wet conditions and vaulted onto the interstate.

Police provided assistance in extricating the people inside from the vehicle which included the 15-year-old driver, as well as the 12-year-old passenger who was reported as a runaway who was involved in human smuggling.

Both were from San Antonio and the vehicle they had been driving turned out to have been stolen earlier.

Also inside the vehicle was an illegal immigrant who was transported to the hospital with injuries.

The teen driver was arrested and charged with human smuggling causing bodily injury, evading arrest causing bodily injury, drug possession and unauthorized use of a motor vehicle.