A cement truck driver was trapped inside his truck after it rolled over early this morning in the city's northwest.

The accident happened at the westbound Stony Trail exit to southbound Crowchild Trail shortly before 5 a.m.

The fire department's heavy rescue team used specialized equipment to extricate the driver. He was freed from the wreckage by about 7 a.m., EMS officials said.

The man in his 30s was taken to Foothills hospital in serious condition with multiple traumatic injuries including leg and arm injuries, EMS said.

Traffic in the area will be disrupted for several hours while the crash is investigated. The truck's contents have to be removed before the crash scene can be cleared away, police say.

The driver's employer, Lafarge, says an internal investigation has been launched and the company is cooperating with authorities as they also investigate the crash.

"Lafarge is very concerned about our driver. We were at the accident site this morning and are at the hospital with his family," said spokeswoman Jennifer Lewis in an email to CBC News.