Nope! They have a shuttle bus. I was there on the first interview day, but it was very well run. I don't think anyone had a problem with the transit.
Good luck – I'm sure you'll have an excellent time!

Both my interviewers had read my application very thoroughly, so we were able to have some pretty awesome discussions. I think UCI may try to pair you up with interviewers from similar backgrounds, if such interviewers are available.
🙂
@Vaccinator I'm pretty sure I signed an NDA regarding that portion of the interview.
🙁 Nevertheless, I will say that I did not find their MMI station very stressful.