Concrete Road Kerb

As an element of roads and highways, kerbs (kerbstone, crib-stane (Scots) or sometimes curbs (US)) serve a number of purposes:
Defining the limits of the carriageway.
Containing the carriageway to prevent ‘spreading’ and loss of structural integrity.
Creating a barrier between vehicles and pedestrians.
Providing a physical ‘check’ to prevent vehicles leaving the carriageway.
Allowing surface water to drain away by forming a channel.
Traditionally, natural stone was the most commonly used material for kerbs, but these have now largely been replaced by pre-cast concrete.