US 99 Highway TourStop 12 · Los Angeles CountyOpen US 99 in the Tour AppVirtual Tour US 6 / US 99Newhall Pass US 6 / US 99 Junction Tunnel Station The Tunnel Station Viaduct (53-409), as it is known, was originally built in 1911 by the City of Los Angeles. The structure was later widened … Continue reading US 6 / US 99 Junction – Tunnel Station