Quebec) is an outdoor representative in Canada. Major products/contracts include: Mississauga Transit advertising on buses Transit shelter contracts in the municipalities of: Halifax, Cape Breton, Saint John, Quebec City, Saguenay, Trois-Rivières, Sherbrooke, Montreal, Oakville, Mississauga, Vaughan, Richmond Hill, Markham, Pickering, Newmarket, Hamilton, London, Windsor, Leamington, Sarnia, Barrie, Winnipeg, Calgary, Edmonton, and Vancouver In addition Outfront Media Canada represents products including billboards, murals and large format products like Superboards in the top markets across the country. Outfront Media products are audited and measured by COMB (the Canadian Out-of-Home Measurement Bureau). Past names National Advertising Company (3M National or National 3M) Whiteco Gannett Outdoor Outdoor Systems (OSI) Infinity Outdoor Viacom Outdoor CBS Outdoor Transportation Displays, Inc. (TDI) References External links Advertising agencies of the United States Marketing companies established in 1938 Former CBS Corporation subsidiaries Outdoor advertising agencies Signage companies Companies listed on the New York Stock Exchange