parking brake
US /ˈpɑːr.kɪŋ breɪk/
UK /ˈpɑːr.kɪŋ breɪk/

1.
a brake in a vehicle that can be used to keep it stationary, typically engaged by a hand lever or foot pedal
:
•
Always engage the parking brake when you park on a hill.
•
He forgot to release the parking brake before driving off.