Gngoatの話題です。ちょっと分かりづらいのですが、写真のような「縄のれん」が、橋をくぐるときや、トンネルの入り口の前に設けられているそうです。屋根の上にいるブレーキマン等に、橋やトンネルの接近を知らせるものとのことです。
以下、転載します。
There were strings or light ropes suspended from it at about 6-12" intervals. If a brakeman was "decorating the tops" as they once did these would brush against him and he would know he better get flat down on the car he was on quickly.
These rope devices were once very common on most railroads in all parts of the US. Almost anywhere there was an overhead bridge or tunnel, you could expect to see one.
以下、転載します。
There were strings or light ropes suspended from it at about 6-12" intervals. If a brakeman was "decorating the tops" as they once did these would brush against him and he would know he better get flat down on the car he was on quickly.
These rope devices were once very common on most railroads in all parts of the US. Almost anywhere there was an overhead bridge or tunnel, you could expect to see one.