{"id":3543,"date":"2026-04-14T13:22:20","date_gmt":"2026-04-14T11:22:20","guid":{"rendered":"https:\/\/www.igeas.com\/?post_type=realizzazioni&#038;p=3543"},"modified":"2026-04-24T17:33:21","modified_gmt":"2026-04-24T15:33:21","slug":"construction-works-for-the-variant-of-state-road-no-20-ss-20-on-the-section-between-km-138000-and-km-143300","status":"publish","type":"realizzazioni","link":"https:\/\/www.igeas.com\/en\/projects\/construction-works-for-the-variant-of-state-road-no-20-ss-20-on-the-section-between-km-138000-and-km-143300\/","title":{"rendered":"Construction works for the variant of State Road No. 20 (SS 20) on the section between km 138+000 and km 143+300."},"content":{"rendered":"<p><strong>Project objective<\/strong><\/p>\n<p>The SS 20 variant was planned to replace a highly hazardous road section affected by frequent rockfalls from the hillside; at the same time, the new alignment provides improved travel times.<br \/>\nState Road No. 20, which partly runs through French territory, is a major corridor as it enables access from western Liguria and France to the Piedmont Region. The Alpine chain is crossed via the Tenda Pass tunnel (between Italy and France).<\/p>\n<p><strong>Alignment description<\/strong><\/p>\n<p>The variant section under design has an overall length of approximately 3,800 m; travelling downhill, it diverges from the existing alignment near the built-up area of Airole.<br \/>\nThe first structure is the Airole viaduct (L = 85 m); the alignment then continues through the \u201cCima di Rovere\u201d tunnel with a total length of 1344.60 m.<br \/>\nImmediately downstream of this tunnel, a rockfall protection gallery (L = 120 m) was built to protect the roadway platform from potential rockfall, considering the steepness of the overhanging slope.<br \/>\nThe alignment then continues for 96.9 m in a natural tunnel (\u201cLamberta\u201d) and subsequently through an additional cut-and-cover rockfall protection gallery (L = 182 m).<br \/>\nThe alignment then comprises, in sequence, the \u201cNoceire\u201d natural tunnel (L = 593.40 m) and the \u201cColombo\u201d viaduct (L = 92.00 m), required to overpass the existing roadway and the Roya stream.<br \/>\nThe variant alignment finally continues downstream with the \u201cBocche\u201d natural tunnel (L = 603.60 m), at the exit of which it reconnects to the existing road network.<\/p>\n","protected":false},"featured_media":1424,"parent":0,"template":"","settore":[30],"class_list":["post-3543","realizzazioni","type-realizzazioni","status-publish","has-post-thumbnail","hentry","settore-underground-works"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Construction works for the variant of State Road No. 20 (SS 20) on the section between km 138+000 and km 143+300. - IGEAS Engineering S.r.l.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.igeas.com\/en\/projects\/construction-works-for-the-variant-of-state-road-no-20-ss-20-on-the-section-between-km-138000-and-km-143300\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Construction works for the variant of State Road No. 20 (SS 20) on the section between km 138+000 and km 143+300. - IGEAS Engineering S.r.l.\" \/>\n<meta property=\"og:description\" content=\"Project objective The SS 20 variant was planned to replace a highly hazardous road section affected by frequent rockfalls from the hillside; at the same time, the new alignment provides improved travel times. State Road No. 20, which partly runs through French territory, is a major corridor as it enables access from western Liguria and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.igeas.com\/en\/projects\/construction-works-for-the-variant-of-state-road-no-20-ss-20-on-the-section-between-km-138000-and-km-143300\/\" \/>\n<meta property=\"og:site_name\" content=\"IGEAS Engineering S.r.l.\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-24T15:33:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.igeas.com\/wp-content\/uploads\/2026\/03\/054_LOMBARDINI_Variante_SS20-0-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"768\" \/>\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.igeas.com\\\/en\\\/projects\\\/construction-works-for-the-variant-of-state-road-no-20-ss-20-on-the-section-between-km-138000-and-km-143300\\\/\",\"url\":\"https:\\\/\\\/www.igeas.com\\\/en\\\/projects\\\/construction-works-for-the-variant-of-state-road-no-20-ss-20-on-the-section-between-km-138000-and-km-143300\\\/\",\"name\":\"Construction works for the variant of State Road No. 20 (SS 20) on the section between km 138+000 and km 143+300. - 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