
CBS, which declined to break out CBS Outdoor's UK revenue or profit, said the revenue decline reflected what it termed the "soft" ad market. It also blamed the "unfavourable impact" of foreign exchange rate changes, as the US dollar strengthened against most currencies in Q2.
International revenues fell 36% to $156m, from $243.3m in Q2 2008.
In a separate company filing, CBS said it had suffered reduced revenue on its London Underground contract, which it conceded had "project delays". It would not, however, detail the actual revenue reduction from the contract.
CBS picked up the estimated £1.5bn ad sales contract for London Underground in May 2006, covering 275 stations, 33,000 poster sites on stations and 88,000 panels inside Tube trains. The contract, thought to be the largest out-of-home contract in the world, began in August 2006 and was scheduled to run for eight-and-a-half-years.
In its results release, CBS said revenues from North America for the second quarter of 2009 fell 22% to $278.1m, primarily due to lower income from its US billboard business and changes in foreign exchange rates.
CBS Outdoor's international division recorded a loss in Q2, with the company reporting an international operating loss before depreciation and amortisation or pre-tax loss, of $20.2m in 2009, as against a profit of $26.9m for the same period last year.
CBS Interactive, CBS' content arm that owns companies such as CNET and Last.fm, posted revenue of $126.4m in Q2 - up from $40.2m for the same quarter last year, partly reflecting its $1.8bn acquisition of CNET in May 2008.