It seems as if the Ford government is determined to push through a couple of transit projects; one is the Scarborough Subway and the other is the westward expansion of the Crosstown line from Mount Dennis to Renforth Drive and from there link to Pearson Airport. True to their promises, Ford and Etobicoke Centre MPP Kinga Surma want much of the line along Eglinton to be underground and so a Request for Qualifications was issued on March 10 for companies to express their interest (and show their credentials) in the tunnelling. Six kilometres of the line between Scarlett Road and Renforth Drive will be underground.
An RFQ seeks interested parties who, if they qualify, will then be invited to bid on actual contracts.
Read more here.
For a detailed view of the various options for the extension read this.