Any civil construction project requires a stringent focus on safety, and this is particularly the case on road and rail projects where work is often done in close proximity to live traffic and in the presence of overhead lines. The common practice is to have a spotter who watches the machine and alerts the operator if they are in danger of hitting something. However, inattention by the spotter or miscommunication can result in human error.

One way to help mitigate this danger is to ensure that plant and machinery are fitted with height and slew limiters.