New York City is involved in a constant process of renovation and new construction. To limit construction noise, the Noise Code mandates that all construction be conducted in accordance with noise mitigation plans that address the specific location, type of work, and timing of a project. The Code also sets standards for noise levels created by handling containers and construction material on public streets, and ways to lessen the noise from each type of construction equipment. For example, jackhammers must be outfitted with noise-reducing mufflers and/or have portable street barriers to reduce the sound impact on the area.