While the government has not yet decided whether to expand Ontario's current restrictions, Calandra said he came away from meetings with his provincial counterparts impressed by what he saw after Quebec introduced a "bell-to-bell" cellphone ban.

This week's filings show health care, housing, industrial policy and technology continuing to dominate lobbying efforts at Queen's Park.

Ontario Liberal leadership candidate Dylan Marando spent nearly three weeks sleeping in provincial parks, driving thousands of kilometres on northern highways and meeting residents in communities that rarely see leadership hopefuls.