The phrase "big construction projects" refers to large-scale building or engineering endeavors that require extensive planning, coordination and execution. These types of projects can range from constructing new buildings such as skyscrapers, bridges, highways, dams, airports, stadiums, and other infrastructure developments, to civil engineering works like water supply systems, sewage treatment plants, power generation facilities, etc. Big construction projects often require significant investment of time, money, labor, and materials, and can have a profound impact on the local economy and community. They are typically undertaken by experienced contractors or construction companies with specialized expertise in managing such complex endeavours.