Vehicle Controls and Ergonomics
When and Why to Actually Use the Parking Brake
Last reviewed: 2026 · Driviology Road Safety Education Team
Quick Answer
The parking brake should be used every time a vehicle is parked, not just on a hill, since it holds the vehicle independently of the transmission and provides a backup if the main brakes ever fail.
Many drivers only think to use the parking brake on a hill, but it serves a broader safety role worth using consistently.
Why It Matters Beyond Hills
The parking brake holds the vehicle independently of the transmission, meaning it adds a genuine layer of security even on flat ground, particularly alongside a manual transmission’s gear selector.
A Backup If the Main Brakes Fail
In the rare event the main brakes fail, the parking brake can serve as an emergency backup, providing a way to slow the vehicle that does not depend on the primary hydraulic system.
Building a Consistent Habit
Using it every time you park, rather than only when a hill makes it obviously necessary, keeps the mechanism working properly and builds a habit that pays off when it matters most.