the 50-kilometre cross island line will go across the island of singapore, passing through tuas, jurong, sin ming, ang mo kio, hougang, punggol, pasir ris and changi. the addition of the new line brings commuters with another way for east–west travel to the current east west line. it will also connect to all the other major lines to serve as a key transfer line, adding to the role currently fulfilled by the orbital circle line. the first stage will open by 2029, and other stages are expected to open by 2031.