[Antonio [G-RP]]

You cannot do that, it only works in radius all around the point. But as (above) said, you can just make it like..

if the bus is within (radius = 50) of a player, set the velocity 50
if the bus is within (radius = 25) of a player, set the velocity 25
if the bus is within (radius = 10) of a player, set the velocity 10
if the bus is within (radius = 5) of a player, set the velocity 0 (so it stops)