Standing before a sage or elder who rides past

Hi,

The obligation to rise before the wise or elderly applies where they are riding by, not only where they are on foot.

(Shulchan Aruch Yoreh Deah 244:2)

Note: I haven't seen the case of a car/bus/train discussed, but the sources do require rising before a wagon. It appears to me that if those who are outside the vehicle cannot tell that a sage inside, the requirement of standing is mitigated; please consult your local rabbinic authority.

Have a great day,
Mordechai