Strategic noise maps of the national, departmental and municipal road network whose traffic exceeds 6 million vehicles per year (1st deadline) — Department of Puy-de-Dôme — 2009 — a night

3 sets of graphic documents are available in this dataset: — Standard maps a represent, for the reference year, the areas exposed to more than 55 dB for the Lden indicator (24h) and to more than 50 dB(A) for indicator Ln (night), — the type b maps identify the areas affected by noise referred to in the Prefectural Order of 2 June 1999 on noise classification of the land transport infrastructure of the Department of Puy-de-Dôme, — the type c maps represent areas likely to contain buildings exceeding the limit values (62 dB(A) for indicator Ln and 68 dB(A) for indicator Lden)