Challenges and Considerations
The cover of a manhole is usually made of durable materials such as cast iron or concrete to withstand the weight of vehicles and foot traffic. It is designed to be removable, providing access to the underground infrastructure when necessary. The cover is typically flush with the surrounding pavement to prevent vehicle accidents or damage. Manholes are often marked with warning signs or painted in bright colors to increase visibility and awareness for safety. They may also be secured with locks or other devices to prevent unauthorized access.