Canada's Worst Driver 4 was the fourth season of the Canadian reality TV show Canada's Worst Driver, which aired on the Discovery Channel. As with previous years, eight people, nominated by their family or friends, enter the Driver Rehabilitation Centre to improve their driving skills. The focus of this season was on the Legal Consequences of Bad Driving. This year, the Driver Rehabilitation Centre is located at the old Guelph Reformatory Prison, an abandoned correctional facility in Guelph, Ontario that closed down in 2002 due to being too harsh. The initial drive started in Kitchener, Ontario and the final road test occurred in Toronto, Ontario.