Usually, or according to the map and Rodney's information at least, reaching specific Domes would require switching trains in certain nodes.
However, Khan had chosen a popular and easy-to-reach location for his first real trip through Merth 290. Dome 100 was his destination, and the train taken from Dome 56 stopped right under it.
Sadly, for many passengers, Dome 100 was also their destination. They could ignore the hooded strangers while they sat silently and affectionately on the train, but their survival instincts rang again as soon as they stood up.
Exiting such crowded vehicles often led to chaotic, hurried moments, but the area under Dome 100 was unusually calm and orderly that day. The passengers feigned ignorance but also waited for Khan and Liiza to leave the train before going on with their businesses. They also avoided joining the queues for the elevators, allowing the two to resurface quickly.