Real-Time tracking is currently down. Specifically, the internal tracking feed from MyBus is currently not responding. In addition to taking our real-time tracking down, it also appears that MyBus urls are not responding (for example: UW Campus Hub).
I've sent emails to appropriate parties, but it's out of my hands to fix this issue at this point. Here's hoping it's resolved sooner rather than later.
Update: Tracking seems to be back up as of 10:40 am.