Ace Driver A5E
You are a virtuoso of driving and piloting vehicles, able to push them beyond their normal limits and maneuver them with fluid grace through hazardous situations. You gain the following benefits:
You gain an expertise die on ability checks made to drive or pilot a vehicle.
While piloting a vehicle, you can use your reaction to take the Brake or Maneuver vehicle actions.
A vehicle you load can carry 25% more cargo than normal.
Vehicles you are piloting only suffer a malfunction when reduced to 25% of their hit points, not 50%. In addition, when the vehicle does suffer a malfunction, you roll twice on the maneuver table and choose which die to use for the result.
Vehicles you are piloting gain a bonus to their Armor Class equal to half your proficiency bonus.
When you Brake, you can choose to immediately stop the vehicle without traveling half of its movement speed directly forward.
Source: Adventurer's Guide (EN Publishing) · License: Creative Commons Attribution 4.0 / OPEN GAME LICENSE Version 1.0a details