  In this first paper of a series of two we are going to show that, on the
ground of few reasonable hypotheses, an equation linking the number of vehicle
N($\tau_i$), that run from (i-1)-th to the i-th hour, to the ground-level
hourly average measured values of an arbitrary pollutant concentration,
$C(\tau_i,z=0)=C(\tau_i)$, can be established. The traffic environmental model
so generated is validated via a fuzzy logig approach. In a second paper we will
valitadeted and calibrated it via a manual counting of traffic fluxes and its
provisional capability will be tessted
