Rockfall
Rockfall refers to quantities of rock falling freely from a cliff face. A rockfall is a fragment of rock detached by sliding or falling, that fa…
Down
Road surface
A road surface or pavement is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or…
Police
The police is a government agency charged with maintaining public order and security, tracking down and investigating criminal offenses, providi…
Emergency lane
A shoulder is an emergency stopping lane by the verge of a road or motorway. The purpose of building a shoulder is that in the event of an emerg…
Give way
A yield or give way sign indicates that merging drivers must prepare to stop if necessary to let a driver on another approach proceed. A driver …
