Directive 2008/50/EC of the European Parliament and of the CouncilDangos y teitl llawn

A. General

Ambient air quality shall be assessed in all zones and agglomerations in accordance with the following criteria:

1. Ambient air quality shall be assessed at all locations except those listed in paragraph 2, in accordance with the criteria established by Sections B and C for the location of sampling points for fixed measurement. The principles established by Sections B and C shall also apply in so far as they are relevant in identifying the specific locations in which concentration of the relevant pollutants are established where ambient air quality is assessed by indicative measurement or modelling.

2. Compliance with the limit values directed at the protection of human health shall not be assessed at the following locations:

(a)

any locations situated within areas where members of the public do not have access and there is no fixed habitation;

(b)

in accordance with Article 2(1), on factory premises or at industrial installations to which all relevant provisions concerning health and safety at work apply;

(c)

on the carriageway of roads; and on the central reservations of roads except where there is normally pedestrian access to the central reservation.