when was the red cross symbol first used
Emblems of the International Red Cross and Red Crescent Movement The Red Cross on white background was the original protection symbol declared at the 1864 Geneva Convention. The ideas to introduce a uniform and neutral protection symbol as well as its specific design originally came from Dr. Louis Appia, a Swiss surgeon, and Swiss General Henri Dufour, founding members of the International Committee.
Warning sign These signs are used to warn of level crossings ahead. In most countries, a red triangle warning sign is used, with various pictograms for unguarded crossings, crossings with manual gates, and automatic level crossings. In most of Europe, an old-style gate is used for a crossing with gates, and a steam locomotive for a crossing without gates. Germany uses an electric train. Similar pictograms are also used in Ireland, albeit on an amber diamond sign. In the United States the warning of all types of railway crossings is made using a circular yellow sign. The actual crossing is also marked with crossed "railroad crossing" crossbuck signs (stop, look, listen) and possibly lights, bells, and barriers.