Researchers say data from long-haul trucks, and cars made by General Motors, is critical for addressing traffic congestion and road safety. Data privacy experts have their concerns.

© Kaiti Sullivan for The New York Times

The program will unleash an economic boon, breathing new life into a city still trying to get its bearings post-Covid.

Making the impromptu five-hour ride between two Chinese cities became a craze among young people. But as their numbers swelled, the authorities shut it down.