When it comes to
construction and design of road, there are many factors to consider. One of the
most critical aspects and essential components to consider in the construction
and design of roads is the road kerb. Road kerbs are raised edges or barriers
positioned at the sides of roadways to separate the road surface from adjacent
areas like sidewalks or medians. Road kerbs serve both functional and aesthetic
purposes. They play a crucial role in guiding traffic, preventing vehicles from
straying off the road, and providing delineation between different sections of
a road. They come in various shapes and sizes, each designed to meet specific
requirements, and offer advantages in terms of safety, traffic management, and
overall infrastructure durability.
Engineering
Functions of Road Kerbs
Reinforces the Asphalt
Pavement. When a vehicle passes over an asphalt pavement, the load is
transmitted across the pavement. Without concrete kerbing, this load will
likely push the asphalt outwards over time, resulting in pavement failure. This
explains why most high-traffic areas, like parking lots and urban streets, are
usually lined with kerbs.
Provides Edge Protection.
The edges of asphalt pavement are its most vulnerable point; they are the most
susceptible to crumbling, chipping, and breaking due to the constant stress of
traffic and environmental factors. By installing concrete kerbing, a sturdy
barrier is created that shields these vulnerable edges, significantly extending
the lifespan of asphalt pavement.
Improves Drainage. Another
key benefit of concrete kerbing is that it improves pavement’s drainage
capabilities. It directs runoff away from the pavement and towards proper
drainage structures, such as storm drains or swales, thus preventing water from
pooling on the surface. This is important because it prevents water from
seeping into the pavement’s base layers, which can severely shorten its
lifespan.