Original sentence: Three cities have light rail systems—the Calgary CTrain, the Edmonton Light Rail Transit, and the O-Train in Ottawa—and Toronto has an extensive streetcar system
Edited sentence: Construction delays saw Phase 1 miss its Q4 2018 opening; the city predicts it will be complete by Q2 2019.It will connect with the existing O-Train line.Ottawa's LRT is undergoing a vast expansion, creating a new cross-core line with 3 km of underground tunnels.Three cities have light rail systems—the Calgary CTrain, the Edmonton Light Rail Transit, and the O-Train in Ottawa.Toronto has an extensive streetcar system.Two more phases will see it link with the airport and suburban communities over the next decade