Set Truck Retirement Goals The model year of a port truck is the
primary factor used to determine the amount of diesel pollution
that a truck contributes to a port community. As illustrated in
the chart below, newer trucks, and those trucks that are
retrofit with diesel particulate filters (DPFs), produce
significantly lower levels of criteria pollutants including NOx
and PM. Therefore, the CRT/EDF Clean Trucks Initiative gives
ports the tools they need to set goals to retire older, higher
polluting truck from port service, and replace them with newer,
cleaner trucks. This is achieved by a port setting either
voluntary or regulatory timelines for the progressive phase-out
of port drayage trucks according to their model year. For
example, CRT supported a truck phase-out timeline at the Port of
Seattle that called for the retirement of all pre-1994 drayage
trucks from port service by January 2011, then gradually ramped
up to a requirement that all trucks serving the port must be
model year 2007 or newer by 2018