Under General Municipal Law Section 239, the county planning board has jurisdictional review of subdivisions and zoning actions that are located within 500 feet of state or county right-of-way, municipal boundary, or located in an agricultural district. In its review the county planning board must, by law, consider the compatibility of various land uses with one another; the effect of traffic generation on other land uses; the adequacy of existing and proposed thoroughfare facilities; impact of proposed land uses on existing and proposed private or municipal uses. The protection of community appearance and character, as regards to predominant land uses, population density, and the relation between residential and non-residential areas is also considered. Another important responsibility is the review of official development policies as may be expressed through comprehensive plans, capital programs, or regulatory measures.