Metro Transit route 4 is nearly identical to route 3, except for its terminal points on either end of the route. In fact, Metro's timetables list routes 4 and 3 together. Route 4 is a very popular route, always busy, and uses electric trolley buses most of the time.
At its northern end, route 4 terminates at east Queen Anne, on Nob Hill Avenue N, between Garfield and Galer Streets.
Route 4 follows Boston Street and Taylor Avenue N, on the east side of Queen Anne Hill. It stops at Seattle Center on 5th Avenue N.
Route 4 then turns south onto 23rd Avenue S, S Dearborn Street, S Judkins Street, Martin Luther King Jr Way S, and terminates on S Walker Street (between Martin Luther King Jr Way S and Rainier Avenue S), in Judkins Park.