Ontario Premier Doug Ford says he wants to build a tunnel for cars and transit under Highway 401 that would stretch roughly from Brampton to Scarborough.

Citing increasing gridlock and little room for highway expansion at a news conference Wednesday morning, Ford says his government will begin studying the technical feasibility of building a tunnel stretching across the GTA under the country's busiest highway.

"This tunnel and expressway will cut gridlock, support economic growth and help get people moving faster," Ford said.