Breda-built <a href="https://en.wikipedia.org/wiki/Dual-mode_bus" class="extiw" title="en:Dual-mode bus">dual-mode bus</a> 5096, of Seattle's Metro Transit, westbound at Westlake station in the Downtown Seattle Transit Tunnel.  The photo was taken on Monday, September 17, 1990, the second day of service in the tunnel (the first being Saturday, Sep. 15) and the first weekday. No. 5096 was in service on route 107. (Metro was not yet part of King County government at that time.)
<a href="//commons.wikimedia.org/wiki/User:Steve_Morgan" title="User:Steve Morgan">Steve Morgan</a> (of Portland, Oregon)
<span class="int-own-work" lang="en">Own work</span>