[Current tasks of hygienic provisions of metro design and construction]

A new part of the existing document on sanitary norms and metro design is proposed to present as a separate section "Hygienic and Ecological Requirements". Its structure should be determined by current views on the regulated environmental factors (physical, chemical, biological, ergonomic). Requirements should be systematized by hygienic criteria of the duration and rate of the human influence of these factors by taking into account of the functional purpose of premises and erections.