page_title: Greek railway signalling
section_title: Switch points
hierarchical_section_title: Greek railway signalling / Hellenic Railways (OSE) signalling / Switch points
caption_attribution_description: English: GREECE: Points lever with points position indicator (Signal 31c) at Agioi Anargyroi train station (formerly Kato Liosia station).
context_page_description: The first railway signalling in Greece was installed on the Athens–Piraeus Railway at the turn of the 20th century, when semaphores and boards were added with the line’s electrification. Other Greek trains at that time were controlled by signals given manually by station masters. During World War II, German occupation forces installed mechanically-operated semaphore signals at the entrance to all stations, with some light signals at busy stations. Modern signalling is provided through colour light signals. Radio communication between train stations and drivers was introduced in 1973 and digital communication is an ongoing present-day introduction.
context_section_description: Most switch points, especially those located in stations and marshaling yards, are equipped with a position indicator (Signal 31), which is directly connected to the points operation mechanism. When the points are set to the through track, it displays an orange rectangle to the facing-point movements and a white rectangle to trailing-point movements. When the points are set to the diverging route, the indicator displays a diagonal arrow to the facing-point movements and a white circle to the trailing-point movements.
caption: A points operation lever and indicator (Signal 31)
exif: {"Image SubfileType": "Reduced-resolution image", "Image Make": "NIKON CORPORATION", "Image Model": "NIKON D90", "Image Orientation": "Horizontal (normal)", "Image Software": "GIMP 2.6.7", "Image DateTime": "2010:02:02 17:50:26", "Image ReferenceBlackWhite": "[0, 255, 0, 255, 0, 255]", "Image ExifOffset": "242", "GPS GPSVersionID": "[2, 2, 0, 0]", "Image GPSInfo": "8094", "Image Tag 0x9216": "[1, 0, 0, 0]", "EXIF ExposureTime": "1/250", "EXIF FNumber": "28/5", "EXIF ExposureProgram": "Shutter Priority", "EXIF ISOSpeedRatings": "400", "EXIF DateTimeOriginal": "2010:01:31 09:46:03", "EXIF DateTimeDigitized": "2010:01:31 09:46:03", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "19/5", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "38", "EXIF SubSecTime": "00", "EXIF SubSecTimeOriginal": "00", "EXIF SubSecTimeDigitized": "00", "EXIF ColorSpace": "sRGB", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CVAPattern": "[0, 2, 0, 2, 1, 2, 0, 1]", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "57", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "Low gain up", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0"}