Roads are expressways, highways and major arterial roads in Southern Ontario.
Mapping Source:
Ontario Road Network, 2005, Ontario Ministry of Natural Resources: http://www.mnr.gov.on.ca/en/Business/LIO/2ColumnSubPage/STEL02_167960.html
Additional Information:
Ontario Road Network: http://publicdocs.mnr.gov.on.ca/View.asp?Document_ID=17566&Attachment_ID=37853
Key Land Information Ontario (LIO) Data Sets: http://www.mnr.gov.on.ca/en/Business/LIO/2ColumnSubPage/STEL02_167960.html