There's also a trial of "platooning" of driverless trucks on I-70 in Ohio and Indiana: https://www.forbes.com/sites/richardbishop1/2025/04/24/ease-... A "drivered" lead truck is leading one or more driverless trucks in this case. I drive the stretch of highway these trucks are on fairly regularly. I don't know that I've seen a group of them yet but I'm keeping my eye out. I'm probably just showing my age, but I like…
next level would be to hook these "platoons" together physically and then centralize the propulsion in a super efficient package. And then we could move them off the highways and onto specialized "tracks" that guarantee they don't deviate from the planned routes. speculative, alien technology, admittedly, but some day our scientists will figure it out i bet!
The existing rail system has at least the following constraints:
* Uses steel-on-steel friction, rather than rubber-on-rock. Cars that can do both exist but are rare.
* Can only travel on the specially-prepared rails, not installed at the last-mile, related to the next point.
* Poor cornering and elevation changing.
* Difficulty in changing speeds (over a thousand meters and over a minute, compare to about a hundred meters and less than ten seconds for road vehicles)
* Very limited lanes, usually no passing. Track reservations will be voided if you aren't exactly on schedule.
* Almost all of the "intelligence" (both computer and human) is at one or both ends; the cars in the middle are all "dumb".
Which of these can reasonably be changed?