{"id":19914,"date":"2025-10-08T09:42:40","date_gmt":"2025-10-08T07:42:40","guid":{"rendered":"https:\/\/strettodimessina.it\/web\/?page_id=19914"},"modified":"2026-08-24T12:51:22","modified_gmt":"2026-08-24T10:51:22","slug":"why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected","status":"publish","type":"page","link":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/","title":{"rendered":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"19914\" class=\"elementor elementor-19914\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e8d1f0 e-con-full e-flex e-con e-parent\" data-id=\"4e8d1f0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-c89f756 e-con-full e-flex e-con e-child\" data-id=\"c89f756\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-22226f0 e-con-full animated-slow e-flex e-con e-child\" data-id=\"22226f0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-39c6e63 elementor-heading__align-center animated-slow elementor-widget elementor-widget-heading\" data-id=\"39c6e63\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;,&quot;_animation_delay&quot;:400}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-975dd30 e-con-full e-flex e-con e-child\" data-id=\"975dd30\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;motion_fx_motion_fx_scrolling&quot;:&quot;yes&quot;,&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_offset&quot;:150,&quot;sticky_anchor_link_offset&quot;:240,&quot;motion_fx_devices&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;],&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;],&quot;sticky_effects_offset&quot;:0}\">\n\t\t<div class=\"elementor-element elementor-element-b071c33 e-con-full e-flex e-con e-child\" data-id=\"b071c33\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-af762b0 e-con-full e-flex e-con e-child\" data-id=\"af762b0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-edd03ce elementor-widget elementor-widget-shortcode\" data-id=\"edd03ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t<div data-elementor-type=\"container\" data-elementor-id=\"29719\" class=\"elementor elementor-29719\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t<div class=\"elementor-element elementor-element-24cd24c e-con-full e-flex e-con e-parent\" data-id=\"24cd24c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-94d6326 elementor-button-primary elementor-widget elementor-widget-button\" data-id=\"94d6326\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"elementor-button-wrapper\">\n            <a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#sez1\" class=\"elementor-button-link elementor-button elementor-size-lg\" role=\"button\">\n                \t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">The technical plan of the Strait of Messina Bridge<\/span>\n\t\t\t\t\t<\/span>\n\t\t            <\/a>\n        <\/div>\n        \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4688006 elementor-button-primary elementor-widget elementor-widget-button\" data-id=\"4688006\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"elementor-button-wrapper\">\n            <a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#sez2\" class=\"elementor-button-link elementor-button elementor-size-lg\" role=\"button\">\n                \t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Plan stages and roles<\/span>\n\t\t\t\t\t<\/span>\n\t\t            <\/a>\n        <\/div>\n        \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12745c3 elementor-button-primary elementor-widget elementor-widget-button\" data-id=\"12745c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"elementor-button-wrapper\">\n            <a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#sez3\" class=\"elementor-button-link elementor-button elementor-size-lg\" role=\"button\">\n                \t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Socio-economic aspects<\/span>\n\t\t\t\t\t<\/span>\n\t\t            <\/a>\n        <\/div>\n        \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3bed20 elementor-button-primary elementor-widget elementor-widget-button\" data-id=\"d3bed20\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"elementor-button-wrapper\">\n            <a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#sez4\" class=\"elementor-button-link elementor-button elementor-size-lg\" role=\"button\">\n                \t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Compulsory Purchase<\/span>\n\t\t\t\t\t<\/span>\n\t\t            <\/a>\n        <\/div>\n        \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75330a9 elementor-widget elementor-widget-html\" data-id=\"75330a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<script>\nwindow.addEventListener('load', function() {\n    \/\/ Troviamo tutti i link dei bottoni dentro le sezioni di Elementor\n    const bottoni = document.querySelectorAll('.elementor-button');\n\n    bottoni.forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            \/\/ 1. Rimuovi la classe 'tasto-selezionato' da TUTTI i bottoni nella pagina\n            bottoni.forEach(function(b) {\n                \/\/ Risaliamo fino al contenitore del widget per sicurezza\n                let widget = b.closest('.elementor-widget-button');\n                if (widget) widget.classList.remove('tasto-selezionato');\n            });\n\n            \/\/ 2. Aggiungi la classe al widget del bottone appena cliccato\n            let currentWidget = this.closest('.elementor-widget-button');\n            if (currentWidget) currentWidget.classList.add('tasto-selezionato');\n        });\n    });\n});\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3b6c029 animated-fast e-con-full e-flex e-con e-child\" data-id=\"3b6c029\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e145783 elementor-widget elementor-widget-text-editor\" data-id=\"e145783\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated<\/strong>.<br \/>Solutions involving underwater tunnels (floating) and seabed tunnels (beneath the seafloor) were thoroughly investigated when initially considering what type of stable crossing to build. Both scenarios were later discarded for the following reasons.<\/p><p><strong>Seabed tunnel<\/strong><\/p><ul><li>vulnerability to seismic activity resulting from direct proximity to several active faults in the stretch of sea concerned, particularly regarding deformation or potential rupture of the structure caused by ground movements of even only modest entity, thereby failing to ensure that the tunnel can remain watertight;<\/li><li>considerable depth of the tunnels (up to 250 meters below sea level), requiring the construction of extremely long access ramps; given the restrictions imposed by the related gradients \u2013 essential above all for rail runability -, it would be necessary to build approximately 35 km road tunnel and 50 km of railway tunnel to cross a stretch of sea little more than 3 km wide;<\/li><li>longer travel times;<\/li><li>difficult access for rescue or evacuation operations in case of accidents or natural disasters;<\/li><li>exposure to sabotage.<\/li><\/ul><p><strong>Floating tunnel<\/strong><\/p><ul><li>major impact on the marine environment: the placement of floating tubes at shallow depths (40-50 meters) and their anchorage to the seabed at depths exceeding 200 meters would cause substantial disturbance to flora and fauna (difficult to mitigate), as well as to sea currents;<\/li><li>uncertainties about structural safety and ability to meet performance requirements;<\/li><li>lack of previous projects in areas with high seismic activity and significant sea currents, leading to uncertainty regarding construction technologies, high risks during construction, substantial costs, and difficulties in predicting outcomes;<\/li><li>maintenance uncertainties;<\/li><li>impact hazards related to sinking ships;<\/li><li>exposure to sabotage.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f966995 e-con-full e-flex e-con e-child\" data-id=\"f966995\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5c4c01 elementor-align-center elementor-button-primary elementor-widget elementor-widget-button\" data-id=\"a5c4c01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"elementor-button-wrapper\">\n            <a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/\" class=\"elementor-button-link elementor-button elementor-size-lg\" role=\"button\">\n                \t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Torna indietro<\/span>\n\t\t\t\t\t<\/span>\n\t\t            <\/a>\n        <\/div>\n        \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>FAQ The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.Solutions involving underwater tunnels (floating) and seabed tunnels (beneath the seafloor) were thoroughly investigated when initially considering what type of stable crossing to build. Both scenarios were later discarded for the following reasons. Seabed tunnel vulnerability to seismic &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/\" class=\"more-link\">Read More <span class=\"screen-reader-text\"> &#8220;WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?&#8221;<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"parent":19799,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-elementor.php","meta":{"footnotes":""},"class_list":["post-19914","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.\" \/>\n\t<meta name=\"robots\" content=\"max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 5.0.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_GB\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Stretto di Messina S.p.A. - Il progetto dello Stretto di Messina\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?\" \/>\n\t\t<meta property=\"og:description\" content=\"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-10-08T07:42:40+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-08-24T10:51:22+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?\" \/>\n\t\t<meta name=\"twitter:description\" content=\"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/#listItem\",\"name\":\"FAQ\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/#listItem\",\"position\":2,\"name\":\"FAQ\",\"item\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#listItem\",\"name\":\"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#listItem\",\"position\":3,\"name\":\"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/#listItem\",\"name\":\"FAQ\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/#organization\",\"name\":\"Sito web di WordPress\",\"description\":\"Il progetto dello Stretto di Messina\",\"url\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/wp-content\\\/uploads\\\/2023\\\/10\\\/logo_sdm_colore.png\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#organizationLogo\",\"width\":408,\"height\":112},\"image\":{\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#organizationLogo\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#webpage\",\"url\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/\",\"name\":\"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?\",\"description\":\"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.\",\"inLanguage\":\"en-GB\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/faq-frequently-asked-questions-messina-strait-bridge\\\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\\\/#breadcrumblist\"},\"datePublished\":\"2025-10-08T09:42:40+02:00\",\"dateModified\":\"2026-08-24T12:51:22+02:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/\",\"name\":\"Sito web di WordPress\",\"description\":\"Il progetto dello Stretto di Messina\",\"inLanguage\":\"en-GB\",\"publisher\":{\"@id\":\"https:\\\/\\\/strettodimessina.it\\\/web\\\/en\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO Pro -->\r\n\t\t<title>WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?<\/title>\n\n","aioseo_head_json":{"title":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?","description":"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.","canonical_url":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/","robots":"max-snippet:-1, max-image-preview:large, max-video-preview:-1","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/#listItem","position":1,"name":"Home","item":"https:\/\/strettodimessina.it\/web\/en\/","nextItem":{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#listItem","name":"FAQ"}},{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#listItem","position":2,"name":"FAQ","item":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/","nextItem":{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#listItem","name":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?"},"previousItem":{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#listItem","position":3,"name":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?","previousItem":{"@type":"ListItem","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/#listItem","name":"FAQ"}}]},{"@type":"Organization","@id":"https:\/\/strettodimessina.it\/web\/en\/#organization","name":"Sito web di WordPress","description":"Il progetto dello Stretto di Messina","url":"https:\/\/strettodimessina.it\/web\/en\/","logo":{"@type":"ImageObject","url":"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#organizationLogo","width":408,"height":112},"image":{"@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#organizationLogo"}},{"@type":"WebPage","@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#webpage","url":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/","name":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?","description":"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.","inLanguage":"en-GB","isPartOf":{"@id":"https:\/\/strettodimessina.it\/web\/en\/#website"},"breadcrumb":{"@id":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/#breadcrumblist"},"datePublished":"2025-10-08T09:42:40+02:00","dateModified":"2026-08-24T12:51:22+02:00"},{"@type":"WebSite","@id":"https:\/\/strettodimessina.it\/web\/en\/#website","url":"https:\/\/strettodimessina.it\/web\/en\/","name":"Sito web di WordPress","description":"Il progetto dello Stretto di Messina","inLanguage":"en-GB","publisher":{"@id":"https:\/\/strettodimessina.it\/web\/en\/#organization"}}]},"og:locale":"en_GB","og:site_name":"Stretto di Messina S.p.A. - Il progetto dello Stretto di Messina","og:type":"article","og:title":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?","og:description":"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.","og:url":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/","og:image":"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png","og:image:secure_url":"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png","article:published_time":"2025-10-08T07:42:40+00:00","article:modified_time":"2026-08-24T10:51:22+00:00","twitter:card":"summary_large_image","twitter:title":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?","twitter:description":"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.","twitter:image":"https:\/\/strettodimessina.it\/web\/wp-content\/uploads\/2023\/10\/logo_sdm_colore.png"},"aioseo_meta_data":{"post_id":"19914","title":"#post_title","description":"The idea of building the crossing using a floating tunnel or a seabed tunnel was thoroughly evaluated.","keywords":null,"keyphrases":{"focus":{"keyphrase":"","score":0,"analysis":{"keyphraseInTitle":{"score":0,"maxScore":9,"error":1}}},"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"WebPage","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"seo_analyzer_scan_date":"2026-08-24 10:52:27","breadcrumb_settings":null,"limit_modified_date":false,"open_ai":null,"ai":{"faqs":[],"keyPoints":[],"schemas":[],"titles":[],"descriptions":[],"socialPosts":{"email":[],"linkedin":[],"twitter":[],"facebook":[],"instagram":[]}},"created":"2025-10-08 07:42:40","updated":"2026-08-24 10:52:27","reviewed_by":null,"focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t<a href=\"https:\/\/strettodimessina.it\/web\/en\/\" title=\"Home\">Home<\/a>\n<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t<a href=\"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/\" title=\"FAQ\">FAQ<\/a>\n<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\tWHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?\n<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/strettodimessina.it\/web\/en\/"},{"label":"FAQ","link":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/"},{"label":"WHY WERE THE IDEAS OF AN UNDERWATER TUNNEL AND A SEABED TUNNEL REJECTED?","link":"https:\/\/strettodimessina.it\/web\/en\/faq-frequently-asked-questions-messina-strait-bridge\/why-were-the-ideas-of-an-underwater-tunnel-and-a-seabed-tunnel-rejected\/"}],"_links":{"self":[{"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/pages\/19914","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/comments?post=19914"}],"version-history":[{"count":9,"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/pages\/19914\/revisions"}],"predecessor-version":[{"id":32335,"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/pages\/19914\/revisions\/32335"}],"up":[{"embeddable":true,"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/pages\/19799"}],"wp:attachment":[{"href":"https:\/\/strettodimessina.it\/web\/en\/wp-json\/wp\/v2\/media?parent=19914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}