A march to mark National Aboriginal Day is expected to cause traffic delays through downtown Ottawa Friday afternoon.

The Million First Peoples' March to raise awareness about First Nations treaty rights and sovereignty has been in the works since January.

parliament hill ottawa

Ottawa police said it's scheduled to start at 12:30 p.m. at Victoria Island, moving across the Portage Bridge to Wellington Street, where they’ll march east to Parliament Hill.

Police said the demonstrators have indicated they'll be off the streets by 1 p.m.

Commuters are asked to use alternate routes if possible.