Asbestos cleanup, tight work windows and other TTC delays have slowed the build out of 5G cellular service in Toronto's subway system, and TTC staff now say they don't expect Rogers Communications Inc. will be able to meet a federally imposed deadline that looms at the end of this month. A new report detailing updates on the transit agency's major projects, which is set to go before a Toronto Transit Commission board meeting next Wednesday, says Rogers' 5G implementation is at risk of missing targets. But the document cites issues related to the transit system itself, rather than Rogers' efforts.