- When driving a land vehicle, you can add your proficiency bonus to the vehicle's ability checks and saving throws.
- When you are driving a land vehicle and your vehicle is hit with an attack, you can use your reaction to add your proficiency bonus to your vehicle's AL against that attack, potentially causing it to miss.
- If a land vehicle you are driving is subjected to an effect that allows it to make a Dexterity save to take only half damage, it takes no damage if it succeeds and only half damage if it fails.