Initiative vs. Matrix Initiative, Vehicle Initiative Blues... Options

[TheFiremage]

Hi, all,
I've played and run SR since 2nd ed. and now I've been running 4th ed. lately and saw a funny thing with regards to people with augmented reflexes (cyber/bioware or magical) and those who rig vehicles. I just felt I needed a little input from my fellows here on Dumpshock.

I remember in 2nd and 3rd edition, during combat, passengers would not have access to their full Initiative, supposedly prevented by the erratic motions of the vehicle while moving, but the Rigger, of course, would still receive his full Initiative bonus.

I noticed in 4th ed. this appears to be no longer true, unless I missed something. The reason I ask is this: In my current group one of the players is an Adept, the SRTeam's wheelman, with Improved Reflexes as one of his powers, along with 3 full Initiative Passes. So, when the Adept rolls his Initiative, while he's driving, should he still get to have all three of his Initiative Passes or not?

Thanks!