Hacking planes, trains and automobiles

Planes, trains and automobiles: I never thought the 1987 movie starring John Candy and Steve Martin was funny, and nor do find stories about hacking them amusing. Recent report suggest connected transport could become a target for hackers, but some of it may well be little more than hype. Here's my look at planes, trains and automobiles - as hacker targets, not a source of comedy - and whether you should be concerned.