看板教育著我們：湯姆．蘭托斯隧道並不是這條公路上首創的隧道，早在 1905 年為連結從舊金山 Mission Street 到 Santa Cruz 的南北鐵路，這裡就曾開鑿過隧道。可惜 1906 年大地震的嚴重破壞，致使隧道的開鑿功敗而未竟垂成。
這是社會教育，倍感溫馨，一個國家公民的素質就是這樣一點一滴累積養成的。看板的字體太小不好閱讀，因此我逐一給打字出來，希望對你的了解有所益助：
《 Cut Off! Connecting an Isolated Coast 》
— Making Tracks, the First Tunnel
The first Devil‘s Slide tunnel was built as a corridor for the Ocean Shore Railroad. Construction began in 1905, with plans to lay 73 miles of track from Mission Street in San Francisco to Santa Cruz. The 1906 earthquake caused extensive destruction and delays. Tracks were completed from San Francisco to Tunitas Creek, south of Half Moon Bay and from Santa Cruz to Swanton, but were never connected.
The northern route and tunnel were closed in 1920 due to costs related to earthquake damage and competition from trucking as roads were built.
— There is No Way Around It
There was no easy way to travel between Pacifica and Montara. All routes over San Pedro Mountain were treacherous. In 1879, Half Moon Bay-Colma Road carved the path the Ocean Shore Railroad would later follow. In 1915, construction of Coastside Boulevard over the east slope of the mountain allowed farmers to take produce to Market. Steep grades and hair-raising curves caused many accidents before State Route 1 was completed in 1937.
California State Route 1, renamed Highway 1 in 1964, was closed at Devil‘s Slide for the first time in 1940 and has been plagued by erosion and landslides ever since.