Civil Works on Kerb and Channel: What You Need to Know

23 January 2023

Kerb and channel, also known as kerb and gutter, refers to a structure made of concrete or stone that is normally positioned at the side of a road and is meant to supply drainage for the road and act as a barrier to prevent cars from leaving the road carriageway. Because of various environmental and other circumstances, the usable life of the kerb and channel will differ significantly from location to location. In some regions, kerb and channel might have a lifespan of between 50 and 80 years.

What Exactly Are Kerb And Channel?

A kerb and channel is a structure made of concrete that may be found along the side of a road in most cases. It is intended to improve road drainage and prevent water from entering under the road’s surface, enabling the council to maintain the roads better and minimise the number of potholes and other road defects. A kerb and channel system not only serves to reduce the amount of stress placed on stormwater drainage flows, but it also has the potential to serve as a barrier that stops cars from leaving the road carriageway.

Kinds of Kerb and Channel

The government carries out several kerb and channel construction projects annually. There are two different kinds

  • New works include the installation of kerb and channel on roadways that either do not have a kerb at all or kerb made of asphalt; or
  • Rehabilitation refers to repairing an existing kerb and channel that no longer operates as intended.

Kerb and Channel Construction

Kerbs and channels create a barrier between the road pavement and nature strips. The purpose of this barrier is to help with drainage, improve the channelling and delineation of traffic flows, protect pedestrians, reduce the amount of maintenance required for nature strips, and improve the aesthetic values of road alignment.

Drivers’ behaviour is significantly altered by roadways paved with kerbs. Kerbing affects the distance drivers align their cars from the edge of a road and serves as a physical and psychological barrier preventing drivers from leaving the road surface. It also influences the distance drivers to align their vehicles from the centre of the road. The height and steepness of the kerb, in addition to the presence of additional objects outside the kerb line, are the primary factors that influence the lateral placement of cars. Kerbing enhances the demarcation of road borders, which in turn adds to the improvement of both the road’s aesthetic and safety.

Modifications To The Driveway

When kerb and channel improvements are carried out, the driveway approaches to certain properties may need to be modified to comply with Australian standards and accommodate any extra heights that may be added to the road. During the phase of the design process known as detailed design, engineers will evaluate this. During the construction process, the municipality will build a new driveway invert in addition to the kerb and channel.

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