{"id":294,"date":"2025-07-09T17:18:45","date_gmt":"2025-07-09T15:18:45","guid":{"rendered":"https:\/\/www.systra.com\/turkiye\/?post_type=projects&#038;p=294"},"modified":"2025-11-06T09:13:00","modified_gmt":"2025-11-06T08:13:00","slug":"adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye","status":"publish","type":"projects","link":"https:\/\/www.systra.com\/turkiye\/project\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\/","title":{"rendered":"Adapazar\u0131 \u2013 \u0130stanbul Northern Pass HSR &#8211; \u0130stanbul, Adapazar\u0131"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"content-top-project\">\n    <div class=\"content-top-details\">\n        <svg class=\"icon-sprite details-logo\"><use xlink:href=\"#icon_deco_systra_blanc\" \/>\n        <div class=\"title\">Technical details<\/div>\n        \t        <div class=\"single-content\">\n\t            <div class=\"subtitle\">Customer<\/div>\n\t            <div class=\"desc\">TCDD<\/div>\n\t        <\/div>\n                    <div class=\"single-content\">\n                <div class=\"subtitle\">Dates<\/div>\n                <div class=\"desc\"><p>2012-2019<\/p>\n<\/div>\n            <\/div>\n                    <div class=\"single-content\">\n                <div class=\"subtitle\">Missions<\/div>\n                <div class=\"desc\">Preliminary Design, Detailed Design<\/div>\n            <\/div>\n                    <div class=\"single-content\">\n                <div class=\"subtitle\">Localisation<\/div>\n                <div class=\"desc\">T\u00fcrkiye<\/div>\n            <\/div>\n                    <div class=\"single-content\">\n                <div class=\"subtitle\">Activity<\/div>\n                <div class=\"desc\">High Speed Railway<\/div>\n            <\/div>\n           \n            \n    <\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-dusty-blue-color has-text-color has-link-color wp-elements-2540dd8abafe14e4aba819481aa8bd46\"><strong>It\u2019s design for HSR, which starts from K\u00f6sek\u00f6y &nbsp;and end in Yavuz Sultan Selim Bridge. It is a double track railway line which passes through \u0130zmit Station, Sabiha G\u00f6k\u00e7en Station and Anadolu Station.<\/strong><\/p>\n\n\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>The Adapazari\u2013Istanbul Northern Pass project involved comprehensive engineering and survey work for the design of a 111.6 km dual-line high-speed railway (350\u202fkm\/h) between K\u00f6sek\u00f6y (\u0130zmit) and Yavuz Sultan Selim Bridge. Key services included alternative corridor studies, cost estimation, feasibility assessments, hydraulic and drainage planning, topographic and geotechnical surveys, geological modelling, and preparation of detailed design and alignment profiles. The project also featured application designs for 14 viaducts totaling 3,839\u202fm in a high seismic zone.<\/p>\n\n\n\n<div style=\"height:59px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-figures\">Key Figures<\/h2>\n\n\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>111 km long HSR<\/li>\n\n\n\n<li>350 km\/h design speed<\/li>\n\n\n\n<li>14 viaducts<\/li>\n\n\n\n<li>28 tunnels<\/li>\n\n\n\n<li>8 cut&amp;covers<\/li>\n\n\n\n<li>7 underpasses<\/li>\n\n\n\n<li>5 overpasses<\/li>\n\n\n\n<li>55 culverts<\/li>\n\n\n\n<li>27 road connections<\/li>\n<\/ul>\n\n\n\n<div style=\"height:59px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1437\" height=\"1016\" src=\"https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1.jpg\" alt=\"\" class=\"wp-image-297\" srcset=\"https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1.jpg 1437w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-300x212.jpg 300w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-1024x724.jpg 1024w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-768x543.jpg 768w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-474x335.jpg 474w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-1352x956.jpg 1352w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-800x566.jpg 800w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-180x127.jpg 180w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-153x108.jpg 153w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1-230x163.jpg 230w\" sizes=\"auto, (max-width: 1437px) 100vw, 1437px\" \/><\/figure>\n\n\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"416\" src=\"https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-1024x416.png\" alt=\"\" class=\"wp-image-298\" srcset=\"https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-1024x416.png 1024w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-300x122.png 300w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-768x312.png 768w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-1536x625.png 1536w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-463x188.png 463w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-926x376.png 926w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-474x193.png 474w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-1352x550.png 1352w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-800x325.png 800w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-180x73.png 180w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-153x62.png 153w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2-230x94.png 230w, https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-2.png 1601w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n","protected":false},"author":103,"featured_media":297,"parent":0,"template":"","type-market":[35],"project-market":[50],"project-service":[52],"project-location":[],"type-service":[],"type-solution":[],"class_list":["post-294","projects","type-projects","status-publish","has-post-thumbnail","hentry","type-market-tunnels","project-market-tunnels","project-service-design"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Adapazar\u0131 \u2013 \u0130stanbul Northern Pass HSR - \u0130stanbul, Adapazar\u0131 - T\u00fcrkiye<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Adapazar\u0131 \u2013 \u0130stanbul 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The Adapazari\u2013Istanbul Northern Pass project involved comprehensive engineering and survey work for the design of a 111.6 km dual-line high-speed railway (350\u202fkm\/h) [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.systra.com\/turkiye\/project\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\/\" \/>\n<meta property=\"og:site_name\" content=\"T\u00fcrkiye\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-06T08:13:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.systra.com\/turkiye\/wp-content\/uploads\/sites\/31\/2025\/07\/adapazari-istanbul-northern-pass-hsr-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1437\" \/>\n\t<meta property=\"og:image:height\" content=\"1016\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/\",\"url\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/\",\"name\":\"Adapazar\u0131 \u2013 \u0130stanbul Northern Pass HSR - \u0130stanbul, Adapazar\u0131 - T\u00fcrkiye\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/wp-content\\\/uploads\\\/sites\\\/31\\\/2025\\\/07\\\/adapazari-istanbul-northern-pass-hsr-1.jpg\",\"datePublished\":\"2025-07-09T15:18:45+00:00\",\"dateModified\":\"2025-11-06T08:13:00+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/wp-content\\\/uploads\\\/sites\\\/31\\\/2025\\\/07\\\/adapazari-istanbul-northern-pass-hsr-1.jpg\",\"contentUrl\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/wp-content\\\/uploads\\\/sites\\\/31\\\/2025\\\/07\\\/adapazari-istanbul-northern-pass-hsr-1.jpg\",\"width\":1437,\"height\":1016},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/project\\\/adapazari-istanbul-northern-pass-hsr-istanbul-adapazari-turkiye\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.systra.com\\\/turkiye\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Our projects\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/#website\",\"url\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/\",\"name\":\"T\u00fcrkiye\",\"description\":\"Confidence moves the world\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.systra.com\\\/turkiye\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Adapazar\u0131 \u2013 \u0130stanbul Northern Pass HSR - \u0130stanbul, Adapazar\u0131 - T\u00fcrkiye","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"Adapazar\u0131 \u2013 \u0130stanbul Northern Pass HSR - \u0130stanbul, Adapazar\u0131","og_description":"It\u2019s design for HSR, which starts from K\u00f6sek\u00f6y &nbsp;and end in Yavuz Sultan Selim Bridge. 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