Drive-By Attack (D20 Modern Feat)
From D&D Wiki
You are skilled at attacking from a moving vehicle.
Benefit: You take no vehicle speed penalty when making an attack while in a moving vehicle. If you are the driver, you can use an attack action to make an attack at any point along the vehicle’s movement.
Normal: When attacking from a moving vehicle, you take a penalty based on the vehicle’s speed. Passengers can ready an action to make an attack when their vehicle reaches a particular location, but the driver must make his attack action either before or after the vehicle’s movement.