The coastal road will start from Princess Street Flyover at Marine Lines and will pass under Girgaum Chowpatty, Malabar Hill and emerge near Priyadarshini Park

In a bid to control the cost of the proposed tunnel for the ambitious coastal road, the civic body will be conducting a rock and soil test -- Cerchar Abrasivity Index Test (CAIT) -- between Girgaum Chowpatty and Priyadarshani Park.