underground. The full route will span across the city, from in York to Kennedy station in Scarborough. Line 6 Finch West is an , 18-stop light rail line under construction, extending west in a dedicated right-of-way lane from Finch West station on Line 1 Yonge–University to the Humber College's North Campus in Etobicoke. The line is forecast to provide approximately 14.6million rides a year, or 40,000 a day, by 2031. It is scheduled for completion in 2023, with an estimated cost of $1.2billion. The Ontario Line, which is a rapid transit line and successor to the Relief Line, is expected to be completed by 2030. The Ontario government estimates the line's cost at $10.9billion for the stretch from Ontario Place to Don Mills Road and Eglinton Avenue East at Science Centre station (part of the under-construction Line 5). It is the largest single expansion in Toronto subway history. The Line 2 Bloor–Danforth extension is a subway extension which will continue Line 2 east towards McCowan Road and north towards Scarborough City Centre and to a new terminal at the intersection of McCowan Road and Sheppard Avenue. The $5.5-billion extension will replace the aging Line 3 Scarborough and is expected to be complete in 2030 at the earliest. The Eglinton Crosstown West extension will extend the under construction Line 5 Eglinton west to Renforth station and Pearson International Airport by 2030 or 2031. The line will travel through all six of Toronto's districts that were amalgamated in 1998 and bring the subway to Mississauga. Future plans There is currently one priority TTC expansion plan: The Yonge North subway extension is an extension of Line 1 Yonge–University proposed by the government of Ontario, nearly identical to the existing planned Yonge Subway Extension proposed by the City of Toronto, Metrolinx, and York Region. It would extend Line 1 into Richmond Hill in York Region. The line would travel north from Finch station to Richmond Hill Centre Terminal at Highway 7 and Yonge Street. The estimated cost for the project is $5.4billion, and it is projected to open after the Ontario Line has been completed. There are plans, still under development, for an eastward extension of Line 5 to the University of Toronto Scarborough campus. There is also potential for an eastward subway extension of Line 4 Sheppard, to replace the former Sheppard East LRT project, that would connect with the Line 2 Bloor–Danforth