"2020," T.R. said, and the display shifted. This time traffic was sparser, and moving faster. "The first pandemic. Now, 2021." Another shift. More traffic moving more slowly—there was a traffic jam. "2022." It sped up. "2023. 2024." The lanes emptied out. "That was a hurricane year, just like this one. 2025. You’ll notice a change taking hold," T.R. said, as the years ticked upward, "as self-driving cars take over. In heavy traffic, they drive closer together, almost like they join together into a train. So we can fit more vehicles onto the same stretch of pavement and those vehicles are all going faster—much greater throughput! Here, I’ll flip between 2019 and 2029 and that’ll make it easy to see."