When does the engineering started? It is a very complex question. Because, people started to construct simple machines before engineering profession is defined. According to that concept we may say ancient times. Because people started to produce simple machines like pulleys, lever and wheels at that time. Some people also started to build tools very long long time ago. These are all before 5000 BC. Except those we may check the written sources to track.
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TUNNEL TRAIN CLEARANCE CHECK BY CRRC
CRRC is Chinese state state owned rolling stock manufacturer. It is one of biggest in the sector and have high exports.
In the video below you will see how they are testing their locomotives for tunnels. They have a clearance checking template and they ride the train inside that template. See it in action here;
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