Can the red hat on the construction site go at will?

Of course. The red hats in the construction site are security inspectors, including technicians and contractors. You need to inspect the site, so you can go at will. A construction site is a place where construction projects are developed and civil engineering is carried out. Its scope is often closed by coaming, barbed wire or fence, which restricts the entry and exit of personnel and materials, machinery and vehicles, and is guarded by property management administrators. You may need to register your identity and wear a helmet when entering or leaving.