Yep:

All Trains in the USA are vulnerable to wireless RF command injection (2 points, 5 days ago, 2 comments) https://news.ycombinator.com/item?id=44534886 https://news.ycombinator.com/item?id=44542016

Turns out you can just hack any train in the USA (19 points, 4 days ago, 11 comments) https://news.ycombinator.com/item?id=44548116

Security vulnerability on U.S. trains – known for 13 years (9 points, 3 days ago, 6 comments) https://news.ycombinator.com/item?id=44556373 https://news.ycombinator.com/item?id=44567395

A vulnerability that can be exploited to tamper with a train’s brakes (20 points, 2 days ago, 10 comments) https://news.ycombinator.com/item?id=44568819 https://news.ycombinator.com/item?id=44563178