French vintage steam engine
when train leaves station. The right signal displays the red and white colors meaning "absolute stop" while the left one concerning the train is 90° turned and not visible by engineer meaning "no restiction". Below 30 is the speed limit on the turnouts (18Mph) and Z means beginning of limited speed zone. Followed by a distant panel reading R meaning Resume normal speed after tail of train has run past R signal. End of film shows automatic level crossing
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