The Interstate 5 in Seattle, abbreviated "i-5 Seattle", is the
main north-south interstate highway route across the Greater Seattle area.
The auxiliary highway for the
i-5 in metro Seattle is
connects to the i-5, north and south of Seattle, which serves as the
regional i-5 by-pass for downtown Seattle.
The map above shows the
i-5 in Seattle (highlighted in pink) and
where it travels through the metro Seattle area.