1) Bridge part 2) Freeway safety barrier 3) Highway barrier 4) Highway safety barrier 5) Parkway protection 6) Rail 7) Railing 8) Road safety feature 9) Safety rail 1) Rail 
A 36- to 42-inch railing at the edge of a deck to prevent people from falling.
a protective railing, as along a road or stairway. · a rail laid parallel to a track to prevent derailment or to keep derailed rolling stock from leaving the roadbed.