The first segment runs between the East Hall and the West Hall in Terminal 1. The segment aims to provide a faster and easier way for passengers travelling between immigration and boarding gates at the far end of the Terminal. Westbound service is for departure passengers only, while eastbound service is for arrival passengers only. After arriving the West Hall, departure passengers should approach the boarding gates nearby and board their plane. Passengers are not allowed to take the APM back to the East Hall, where most shops are located. For eastbound service, after reaching the East Hall, all arrival passengers must disembark for immigration, customs, and baggage claim. Also, arrival passengers are not allowed to take the APM back to the West Hall. Since both the East Hall and the West Hall are located within Terminal 1, passengers can choose to instead use travellators or walk, though this will be more time-consuming.