W 164 Falling Rocks 11 Nov 2014 Category: Warning Signs Tag: Warning Signs Description Description W 164 Falling Rocks Sign W 164, Falling Rocks, may be used where there is a danger of rocks falling onto a stretch of road. Related products W 012L Side Road on Dual C’way – Left Read more W 009R Side Road on Outside of Right Bend Read more W 003R T-Junction (Type 1) – Right Read more W 007RL Staggered Junctions – Right/Left Read more