My friends and I have had this discussion as well.
I'm sure at some point the news will say it was due to the driver texting. This isn't possible since the monorail has many redundant systems that (a) prevent it from going too fast, (b) prevent it from going too fast into a station and (c) prevent it from getting too close to another car. Even if the override is engaged by the driver, it will only allow it to go a very slow speed (used to change tracks and other maintanance issues.
So even if he was texting, sleeping, whatever...the system should've taken care of it, so texting wasn't the cause.
Sorry, I just wanted to get my rant out in the open as the news tends to spin these things out of control and not research and actually use their brains to think about something before writing it.
Once again, his family is in my thoughts.