If you mean setting up cones and signs, they must follow the Manual Uniform of Traffic Control Devices.
A public worker is someone who works in the public for example a nurse a police man or a doctor.
Well you see considering that highway workers work on the highway and if the speed limit was raised, then there's more of a possibility of a car "flying" down the highway and hitting the highway worker
construction worker
a lot!
A public service worker is someone who usually workers in a team with other people and assists the public. There are many types of public service workers who specialise in different things and use different skills to assist the public through their job and qualifications.
State worker - an employee of a U.S. State or of the governing body of a country. All U.S. Federal employees can be considered "State Workers", but are generally not referred to as such because of Cold War connotations.
Unfortunately, my co-worker Bob was a casualty of the car crash on the highway yesterday.
civil rights worker
a sanitation worker
They wore silky products.
a middle class silk or caffa worker
A Civil Servant is a Government worker who works in the core ministry while a Public servant is government worker who is a professional and works in Government agency or parastatal