Hours of work for drivers including bus operators, city motor vehicle operators, and highway motor vehicle operators involved in the interprovincial and international transport of goods or passengers and in the transport of mail on contract with Canada Post are modified by the Motor Vehicle Operators Hours of Work Regulations, replacing sections 169 and 171 of Part III of the Canada Labour Code.
The ESDC - Labour Program conducts motor vehicle operator surveys for drivers employed by a federal jurisdiction employer to establish whether a driver is considered to be a city motor vehicle operator or a highway motor vehicle operator. The surveys also determine the prevailing industry practice in the geographical area where the driver is employed. If a driver is uncertain whether a particular survey applies to them, they should contact their local Labour Program office.
Maximum hours of work are defined by the Commercial Vehicle Drivers Hours of Service Regulations administered by Transport Canada:
http://laws-lois.justice.gc.ca/eng/regulations/SOR-2005-313/index.html