{"id":199390,"date":"2025-04-12T17:41:12","date_gmt":"2025-04-12T07:41:12","guid":{"rendered":"http:\/\/www.vibewire.com.au\/?guid=1bad88e3de7090a399e350e9c8b679b5"},"modified":"2025-04-12T17:41:12","modified_gmt":"2025-04-12T07:41:12","slug":"special-design-avoids-sonic-boom-at-hs2-tunnel","status":"publish","type":"post","link":"https:\/\/www.vibewire.com.au\/?p=199390","title":{"rendered":"Special design avoids \u2018sonic boom\u2019 at HS2 tunnel"},"content":{"rendered":"<p><img loading=\"lazy\" width=\"640\" height=\"457\" src=\"https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-1009x720.jpg\" class=\"webfeedsFeaturedVisual wp-post-image\" alt=\"Chiltern Tunnel southern portal. \/\/ Credit: HS2\" style=\"display: block; margin: auto; margin-bottom: 10px; max-width: 100%;\" decoding=\"async\" srcset=\"https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-1009x720.jpg 1009w, https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-300x214.jpg 300w, https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-768x548.jpg 768w, https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-750x535.jpg 750w, https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-624x445.jpg 624w, https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align-600x428.jpg 600w, https:\/\/www.railadvent.co.uk\/wp-content\/uploads\/2025\/04\/HS2-VL-21151-02_Chiltern-Tunnel-S-Portal_Drone-View__Grimshaw-Align.jpg 1280w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/>An innovative design will eliminate the possibility of a sonic boom when HS2 high-speed trains enter the Chiltern Tunnel&#8217;s southern portal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An innovative design will eliminate the possibility of a sonic boom when HS2 high-speed trains enter the Chiltern Tunnel&#8217;s southern portal.<\/p>\n","protected":false},"author":13,"featured_media":1,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[5579,1089,343,47],"tags":[12406],"class_list":["post-199390","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-buckinghamshire","category-hs2","category-infrastructure","category-rail-news","tag-rail-advent"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/199390","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=199390"}],"version-history":[{"count":1,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/199390\/revisions"}],"predecessor-version":[{"id":199391,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/199390\/revisions\/199391"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=199390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=199390"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=199390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}