Local authorities are responsible for matters such as planning, local roads, sanitation, and libraries. Dáil constituencies are required to follow county boundaries as much as possible. Counties with greater populations have multiple constituencies, some of more than one county, but generally do not cross county boundaries. The counties are grouped into eight regions, each with a Regional Authority composed of members delegated by the various county and city councils in the region. The regions do not have any direct administrative role as such, but they serve for planning, coordination and statistical purposes.