FK-Aurora-lk-n-thru-Broad-&-Mercer-ca1933-WEB October 25, 2015 1200 × 711 Seattle Now & Then: The North Seattle Trolley Yard Looking north on Aurora ca. 1933 thru its stop-lighted intersections with Broad and Mercer, together the busiest crossroads in Seattle and most dangerous. Both Broad and Mercer were tunneled under Aurora in the 1950s.