Before an airport gate even exists, engineers have already simulated the people who will walk through it. ✈️🧠 An airport terminal may look like a collection of gates, corridors, security checkpoints and waiting areas. But behind the scenes, engineers can spend enormous amounts of time figuring out one crucial question: How will thousands of passengers actually move through this space? Before construction is finished, airport planners can use computer simulations to model passenger movement through the terminal. Instead of waiting for the airport to open and discovering that a corridor is too narrow or a boarding area becomes overcrowded, engineers can test the design virtually. They can simulate passengers arriving at different times, walking at different speeds, carrying luggage, stopping to check information, joining queues and moving toward their gates. The simulation can reveal where bottlenecks might appear. What happens if several flights board at the same time? What if...