guard rail
US /ˈɡɑːrd reɪl/
UK /ˈɡɑːrd reɪl/

1.
barandilla de seguridad, guardarraíl
a barrier alongside a road, bridge, or other dangerous area to prevent vehicles or people from falling or straying
:
•
The car crashed into the guard rail on the highway.
El coche chocó contra la barandilla de seguridad en la autopista.
•
Pedestrians should stay behind the guard rail for safety.
Los peatones deben permanecer detrás de la barandilla de seguridad por seguridad.