Guest: Andy Takagi, Toronto Star transportation reporter

Premier Ford says he's pitching an unprecedented plan to tackle one of the GTA's biggest headaches; gridlock on Highway 401, the busiest road in North America. His vision is a single three-level tunnel running under the highway, which could stretch from Brampton to Scarborough. He outlined the concept at an unrelated press conference this week, but he's been talking about it for nearly a year. Ford says this will serve people for decades to come, but a two-year feasibility study has just begun, and experts are raising questions about the costs, the timelines and whether this would actually ease traffic congestion.

We take a look at what Ford is proposing, why experts say it might not work and what it could mean for commuters and communities along the 401.

Audio sources: CP24

Produced by Saba Eitizaz and Sean Pattenden