Residents of Mumbai will have to brace for massive traffic jams ahead of the BJP's foundation day celebrations planned at the MMRDA grounds in Bandra Kurla Complex in the heart of the city today. BJP President Amit Shah will address around 3 lakh party workers at the event who are expected to come in from across the state. The event will be a show of strength for the party, and the BJP has booked 28 trains from across the state, as also 50,000 private buses and vehicles for transportation.