Provincial police reopened Highway 417 near Innes Road Thursday, following a rush-hour chain reaction crash sent five people to hospital.
A total of 19 vehicles were involved in the crash.
None of them suffered critical injuries, police and paramedics said.
A dozen more people were released by paramedics at the scene after being assessed, the Ottawa Paramedic Service said.
First responders were called to the crash – which spanned about half a kilometer – at about 7 am
The eastbound lanes would be closed until a cleanup was complete, the OPP said at about 8:45 am