Onestop Media Group, the Toronto-based OOH seller, has now joined the Canadian Out-of-Home Measurement Bureau (COMB).

Announced late yesterday, the move means that Onestop’s transit network will now be measured annually by COMB, the results of which will first be published in the 2011 COMB Data Report and bi-annually after that.

Onestop’s transit network is comprised of digital boards in 63 subway stations in Toronto, showing a hybrid of news, transit information and advertising.

Onestop also operates residential, retail, hotel, corporate and educational networks in Canada.