显示停止和 caution 指示的铁路信号灯. 图像显示了一个铁路信号灯，在十字形结构的每一侧都有四个明显的灯。每一侧顶部都有一个表示停止的红灯，中间有一个表示谨慎的黄灯，底部有一个通常用于表示通行或通过的白灯

railway signal light showing red amber and green beside rural train tracks in countryside

railway signal monitoring equipment with service van and passenger train in rainy industrial landscape this image features a set

被自然覆盖的废弃铁路信号箱

被自然覆盖的废弃铁路信号箱

工业铁路信号塔在雾中发出红色光芒

铁路信号灯显示停止和警告指示器

雪地冬景中的铁路信号

铁路信号不同样式图标集

阴沉的天空下，不祥的铁路信号

铁路信号灯显示红色指示，表示停止或谨慎

秋雾中的旧铁路信号箱和轨道

比利时铁路信号小停信号

日出时分雾气弥漫的铁轨旁的旧铁路信号箱

close up of vintage railway signal light detailed a with two stacked red lights in weathered black metal frame against white

black silhouette of a railway signal post with ladder and platform isolated on white background for transport train themes

black silhouette of a tall railway signal post with ladder and platform isolated on white background for train traffic control

black silhouette of a railway signal post with ladder and platform isolated on white background for train traffic control systems

一座饱经风霜且生锈的铁路信号在模糊的背景下清晰地显现出来

金属轨道旁显示红光的铁路信号灯

砖木结构两层铁路信号箱的详细模型，一个火车站

红色的铁路信号灯在温暖的日落时分停止了列车的旅程。铁轨通向地平线，太阳在模糊的

close up of vintage railway signal light with red yellow and green lenses a detailed image an old fashioned featuring three

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详细的木砖两层铁路信号箱模型，带楼梯微缩景观

铁轨保存历史的精美修复信号

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详细的复古木制铁路信号箱微缩模型，带有红色砖基和楼梯

a detailed closeup view showcases railway signal device positioned directly on the railroad tracks exhibiting red and white

a worn railway signal displays glowing red light the word request visible on its weathered surface vintage control mechanism

混凝土桥下带有红灯的铁路信号

火车、铁路信号和车站标志的黑色剪影

复古铁路信号灯，配有红色和绿色透镜

旧绿色的铁路信号杆，带有红色和白色翼形显示屏，指示停止或继续。复古德国列车交通控制

侧重于铁路信号操作及其相应的图形

the image shows a close up view of a traditional railway signal light system the signal features two red lights positioned side by

classic railway signal light mounted on a metal pole structure the image shows close up view of traditional system features two

铁路信号灯显示多个红灯，指示列车停止