639937 Tuas Checkpoint

Singapore's border checkpoints are among the busiest in the world, with a total of 450,000 travelers every day across the 2 land crossings. Join me an hour before dawn at the Tuas Checkpoint in the west as the waves of traffic start streaming to the city. In 12 hours, they'll come back to leave Singapore: who is making these daily commutes, many on sub-200cc motorbikes?