Dhaka is one of the fastest growing megacities in the world. It is predicted to be one of the world's largest metropolises by 2025, along with Tokyo, Mexico City, Shanghai, Beijing and New York City. Dhaka remains one of the poorest megacities. Most of its population are rural migrants, including climate refugees. Blue-collar workers are often housed in slums. Congestion is one of the most prominent features of modern Dhaka. In 2014, it was reported that only 7% of the city was covered by roads. The first phase of the Dhaka Metro is planned for opening in 2021, coinciding with the golden jubilee of Bangladesh's independence.