信号のメンテナンスの画像素材（写真・イラスト） 1ページ目

線路脇に置かれた交換用の合成まくらぎと保線機器の器具箱

分電盤の中に配線された青いケーブルと端子台のクローズアップ

在来線の線路と入替信号機（近接・クローズアップ）

鉄道の安全運行を支える駅構内に設置された中継信号機【山陽本線　倉敷駅】

日本の鉄道インフラ 複雑に入り組む架線と線路の信号機

鉄道の信号機 青信号を現示する3灯式信号機と架線柱（ローアングル・インフライメージ）

線路脇に立つ鉄道信号機と速度切換標識（望遠・屋外）

鉄道の信号機(中継信号機)と新緑の風景

Technician team talking collaboration working on rooftop building.

新幹線の線路と沿線インフラ設備 スラブ軌道と信号機器のクローズアップ

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

早朝の光を浴びるスラブ軌道の地上子と鉄道インフラのディテール

駅ホームの安全確認設備 無人駅対応の可動柵閉扉表示灯・出発進路開通表示灯

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

在来線の安全を守るATS地上子（自動列車停止装置）のアップ

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

Vandalized Pedestrian Crossing Button With Exposed Wires

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

VHFアンテナ

駅ホームの出発進路表示灯と戸閉合図灯の背面構造（鉄道安全設備・保守点検イメージ）

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

Road and Transport icons collection. Road and transportation icons including car, ship, aeroplane, van, road sign, parking sign, road repairing and many more

鉄道の安全運行を支える停止位置目標（標識）と冬の空

Orange traffic cone on grassy ground beside a wooden post with a metal bracket; fallen leaves scattered around. Outdoor scene with a simple safety marker.

Tall communications tower stands against expansive blue sky

VHFアンテナ

Workers are painting and improving the road.

新幹線の安全運行を支える安全設備・標識（停止限界標識）

Stack of construction helmets and traffic cones isolated white background with clipping path, representing safety equipment

Engineer concept. Worker in Safety Vest Holding Yellow Hard Hat While Pointing to the Camera in a Studio Setting

A male technician wearing a helmet works on a tall telecommunications tower from a heavy duty aerial lift.

Colorful communications mast. Industrial tower showcasing weathered steel framework and devices

Colorful communications mast. Industrial tower showcasing weathered steel framework and devices

Warehouse Forklift Alert Scene. Amber Light On Forklift Indicating Maintenance Or Safety Alert Scene. Media

A mature male technician working on a cell tower mast using a yellow hydraulic crane truck in the city.

Portable traffic light on a rural road under construction

Elevated concrete skyscraper with numerous cellular units and safety features displayed prominently

Retro electronic equipment with exposed wiring and vintage screens

A male technician performs maintenance on a tall telecommunications cellular tower against blue sky clouds.

Railway Cargo Area, An Active Industrial Railway Scene Showcasing Cargo Trains And Complex Wiring Network

Male Worker Wearing Protective Gear Performs Safety Inspection While Communicating With Team On Site . Media

Automatic data acquisition system cabinet at crest of a hydroelectric dam, used for remote monitoring of hydrological and seismic metrics in sustainable energy infrastructure. Smart data monitoring.

Colorful communications mast. Industrial tower showcasing weathered steel framework and devices

A tall telecommunications tower set against an overcast sky, featuring intricate metal lattice construction in orange and white

Dense Network Of Antennas, Industrial Skyline Filled With Communication And Transmission Equipment

Telecom Engineer in Safety Vest and Helmet Inspecting Communication Tower Outdoors

A Telecommunication Tower Standing Tall Against a Clear Blue Sky in the Background