page_title: Central Circular Route
section_title: Route description
hierarchical_section_title: Central Circular Route / Route description
caption_attribution_description: 日本語: 首都高速道路中央環状線山手トンネル、内回り西池袋入口付近。2007年12月8日に妖精書士が撮影。
context_page_description: The Central Circular Route, signed as Route C2, is one of the routes of the Shuto Expressway system serving the central part of the Greater Tokyo Area. The route is a circumferential highway running through the outer wards of Tokyo. The route is the middle of four ring expressways planned for the city; the other three being the C1 Inner Circular Route, the C3 Tokyo Gaikan Expressway, and the C4 Ken-Ō Expressway.
context_section_description: The Central Circular Route has a total length of 48.8 kilometers (30.3 mi).
  It is a ring that lies approximately  8 km (5 mi) from the center of the city and goes through the wards of Edogawa, Katsushika, Adachi, Kita, Itabashi, Toshima, Shinjuku, Nakano, Shibuya, Meguro, and Shinagawa.
  The Yamate Tunnel forms a key part of the Central Circular Route. A deep tunnel constructed beneath Yamate Dori, the first section over 11km in length, was opened to traffic on 22 December 2007. From 2010, the tunnel extended the Central Circular Route south from near Ikebukuro to Ohashi Junction connecting with Route 3. The last 9.4 kilometers (5.8 mi) through Meguro and Shinagawa was opened to traffic on 7 March 2015. When this last section of the tunnel opened the Yamate Tunnel formed Japan's longest, and the world's second longest road tunnel. During the tunnel's first week of operations, traffic volume on the Inner Circular Route was reduced by seven percent from the previous week, and congestion on expressways inside the Central Circular Route (an index measured by recording segments where average traffic speed is less than 40 km/h, and multiplying the affected distance by the affected time) was approximately halved from the previous week.
  The C2 begins and ends at the Bayshore Route, which serves to close the southeastern part of the loop.
caption: Yamate Tunnel
exif: {"Image Make": "FUJIFILM", "Image Model": "FinePix A345", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Digital Camera FinePix A345 Ver1.00", "Image DateTime": "2005:12:01 04:19:43", "Image YCbCrPositioning": "Co-sited", "Image Copyright": "", "Image ExifOffset": "294", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 50, 53, 48, 0, 0, 0, 2, 0, 2, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail Orientation": "Horizontal (normal)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1316", "Thumbnail JPEGInterchangeFormatLength": "8848", "Thumbnail YCbCrPositioning": "Co-sited", "EXIF ExposureTime": "5/11", "EXIF FNumber": "14/5", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "100", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2005:12:01 04:19:43", "EXIF DateTimeDigitized": "2005:12:01 04:19:43", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "3", "EXIF ShutterSpeedValue": "59/50", "EXIF ApertureValue": "297/100", "EXIF BrightnessValue": "1", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "29/5", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "640", "EXIF ExifImageLength": "480", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "1160", "EXIF FocalPlaneXResolution": "1111", "EXIF FocalPlaneYResolution": "1111", "EXIF FocalPlaneResolutionUnit": "3", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0"}