IO and Metrolinx issue RFQ for Scarborough Subway Extension, Canada September 20, 2021 | North America News Infrastructure Ontario (IO) and Metrolinx have issued a Request for Qualifications (RFQ) to build and design the Stations, Rail and Systems (SRS) package for the Scarborough Subway Extension project. ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password