Road and highway gullies are different in that they are often concealed with a metal grate and are designed to eliminate standing, or excess water and to retain any debris-such as litter, mud, leaves and silts, to prevent them from entering the drainage system causing pipe blockages and flooding. The water that is collected is then discharged into drains, ditches, or sewers. In this way, gullies play an important role in ensuring that our roads are safe to drive on and are not covered in surface water after a heavy downpour.
If the road or highway gully becomes blocked and water is allowed to accumulate, it can result in unpleasant odours, and the risk of cars aquaplaning, making it potentially dangerous for both drivers and passengers. Additionally, excess water on the roads leads to greater braking and stopping distances for lorries and cars and can make it difficult for pedestrians to negotiate. In the worst-case scenario, a flooded road can become impassable and consequently closed.