A key station on the 15.6-kilometre Ontario Line subway has advanced through an important milestone, bringing the nightmare of traffic and road closures at one of Toronto's busiest intersections a step closer to clearing. The provincial government announced the start of excavation work for the Ontario Line's Queen Station on Wednesday. Queen Station on the Ontario Line will sit 40 metres below street level, situated beneath the existing TTC Queen Station on Line 1. Queen Station is expected to be the busiest stop on the 15-stop Ontario Line, with a projected 15,000 passengers during peak hours. "We are partnering together with the province to give riders better public transit options," said Chow, adding, "I'm excited to celebrate this important milestone."