A multi-car pileup has shut down the southbound lanes of Deerfoot Trail just south of Memorial Drive, according to Calgary police.

The accident took place around 9:15 a.m. on Monday and the busy road was closed for several hours as crews worked to clear the scene.

Adam Loria with Calgary EMS said crews assessed 18 people involved in the crash and took four to hospital, all with non-life-threatening injuries.

Roads in Calgary have been slick since extremely cold temperatures mixed with heavy snow over the holidays.