I was going to the city by train. But the train station was very high-tech and efficient.

Rather than boarding the train car when it arrives, you'd board a car (not on a train) BEFORE the train came. Then, as soon as the train arrived, it would merely shift the passenger car onto the train. It would also move a car off which contained people who wanted to get off at that particular stop. Then it would leave immediately. No more waiting to cram into a car. No more wasted time.

It did seem like a lot of work just to save like 20 seconds, but in the end it did make things faster, even at the cost of extra complexity and more energy usage.