The majority of maps created contain roads, so having reliable road network data can be pretty important.
The National Road Network (NRN) is a seamless geospatial vector data containing Canadian road phenomena that provides access to over 1 million kilometres of up-to-date centerline road network data. The data has been separated by provincial and territorial jurisdictions.
The spatial resolution of the data is approximately 1:10,000 (but only a general estimate since the data was originated from multiple sources) and should suffice for most projects that requires road information. If you are creating large scale maps then you may want to check the regional or municipal data portals.