{"id":245,"date":"2016-07-07t08:27:22","date_gmt":"2016-07-07t13:27:22","guid":{"rendered":"https:\/\/snyder-associates.u5fz9z3h-liquidwebsites.com\/?p=245"},"modified":"2023-11-21t10:47:50","modified_gmt":"2023-11-21t16:47:50","slug":"diverging-diamond-interchange-benefits","status":"publish","type":"post","link":"\/\/www.dicovercards.com\/diverging-diamond-interchange-benefits\/","title":{"rendered":"safety improvements of a diverging diamond interchange"},"content":{"rendered":"<h2><span style=\"color: #94b8bb;\">innovative design of the diverging diamond interchange<\/span><\/h2>\n<p>a fresh concept in interchange design, known as a diverging diamond interchange (ddi), or double crossover diamond interchange, takes <a href=\"\/\/www.dicovercards.com\/services\/traffic\/\">traffic safety<\/a> and efficiency to a new level. \u201cin a traditional diamond interchange, there are approximately 26 conflict points that can lead to traffic crashes,\u201d explains <a href=\"\/\/www.dicovercards.com\/snyder-contacts\/wade-greiman\/\">wade greiman, pe, transportation business unit leader for snyder &amp; associates<\/a>. \u201cddis have just 14 conflict points. fewer conflict points mean fewer opportunities for vehicles to collide, resulting in a safer, more efficient flow of traffic.\u201d<\/p>\n<p>in a ddi, traffic is shifted from the right side of the road to the left side of the road at each intersection between the interchange ramps and side road. this means left-turning traffic doesn\u2019t cross paths with oncoming traffic, so the chance for a collision is reduced. once left turn intersections are cleared, traffic is brought back to the right side of the road. this simple concept is shown in the image, below.<\/p>\n<p><a href=\"\/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/ddi-05.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-4456 size-large\" src=\"\/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/ddi-05-1024x614.jpg\" alt=\"diverging diamond interchange\" width=\"1024\" height=\"614\" srcset=\"\/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/ddi-05-1024x614.jpg 1024w, \/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/ddi-05-300x180.jpg 300w, \/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/ddi-05-768x461.jpg 768w, \/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/ddi-05-1800x1080.jpg 1800w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h2><span style=\"color: #94b8bb;\">extensive safety &amp; operational benefits of diverging diamonds<\/span><\/h2>\n<p>similar to the concern with roundabouts, ddis utilize an unfamiliar traffic pattern that can create apprehension and fear for some drivers. driving on the left side of the road may feel counterintuitive and even hazardous. in reality, ddis provide numerous safety, operational, and cost benefits over traditional diamond intersection designs, including:<\/p>\n<ul>\n<li>reduced collision potential and increased safety by reducing the number of times vehicles cross paths. in particular, left-hand turns through opposing traffic are eliminated<\/li>\n<li>improved sight distance when turning<\/li>\n<li>reduced potential for wrong-way movement onto freeway ramps, an ongoing problem on our nation\u2019s highways<\/li>\n<li>increased left turn capacity without needing additional lanes<\/li>\n<li>improved traffic flow and safety by reducing the number of traffic lights<\/li>\n<li>increased <a href=\"\/\/www.dicovercards.com\/services\/multimodal-transportation\/\">bicyclist and pedestrian safety<\/a> by routing active transportation users through the median or along the roadway<\/li>\n<li>reduced congestion, resulting in reduced fuel consumption and air pollution<\/li>\n<li>reduced <a href=\"\/\/www.dicovercards.com\/2017\/04\/12\/communication-construction-services-the-snyder-way\/\">construction time<\/a> with little to no additional <a href=\"\/\/www.dicovercards.com\/services\/right-of-way-acquisition-services\/\">right-of-way<\/a> needed to retrofit an existing interchange<\/li>\n<\/ul>\n<p>signage and <a href=\"\/\/www.dicovercards.com\/reduce-long-term-street-repair-costs\/\">pavement <\/a>markings are used throughout ddis to help guide drivers as they become acclimated. however, greiman says 世界杯足球比赛预选赛
 outreach is also essential. \u201cddis are unfamiliar for many people, so 世界杯足球比赛预选赛
 engagement is important. addressing 世界杯足球比赛预选赛
 concerns and questions early on helps garner support. modeling and animation <a href=\"\/\/www.dicovercards.com\/2016\/01\/05\/using-technology-to-improve-project-delivery\/\">technology<\/a> can be particularly useful because it gives drivers an idea of what it will be like to drive through the area once it\u2019s complete.\u201d<\/p>\n<h2><span style=\"color: #94b8bb;\">success generates bright future for diverging diamond interchanges<\/span><\/h2>\n<div id=\"attachment_14324\" style=\"width: 410px\" class=\"wp-caption alignright\"><a href=\"\/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/diverging-diamond-rendering.jpg\"><img decoding=\"async\" aria-describedby=\"caption-attachment-14324\" class=\"wp-image-14324\" src=\"\/\/www.dicovercards.com\/wp-content\/uploads\/2016\/07\/diverging-diamond-rendering.jpg\" alt=\"\" width=\"400\" height=\"240\" \/><\/a><p id=\"caption-attachment-14324\" class=\"wp-caption-text\">using luxology and adobe photoshop, this image was created to assist with 世界杯足球比赛预选赛
 engagement for the <a href=\"\/\/www.dicovercards.com\/projects\/i-35-east-1st-street-diverging-diamond-interchange\/\">e. 1st ave.\/i-35 ddi project<\/a> currently underway in ankeny. snyder &amp; associates design technicians also use microstation, lumenrt, sketchup, adobe premiere pro, and illustrator to create videos and graphics.<\/p><\/div>\n<p>it\u2019s been nearly a decade since the first ddi was implemented in springfield, missouri, and so far the results are encouraging. a 2011 <a href=\"https:\/\/library.modot.mo.gov\/rdt\/reports\/tryy1013\/or11012.pdf\" target=\"_blank\" rel=\"noopener\">performance evaluation conducted by the missouri dot<\/a> yielded positive feedback from springfield drivers, with 80 percent of people reporting that traffic flow had improved. in its findings, the missouri dot shared that total crashes went down by 46 percent in the first year of operation. left-turn crashes were entirely eliminated and right-angle crashes were reduced by 72 percent.<\/p>\n<p>in 2016, carlos sun, professor of <a href=\"\/\/www.dicovercards.com\/services\/municipal-engineering\/\">civil<\/a> and <a href=\"\/\/www.dicovercards.com\/services\/environmental\/\">environmental<\/a> engineering at the university of missouri, along with colleagues across the country, published the <a href=\"https:\/\/trid.trb.org\/view.aspx?id=1394021\" target=\"_blank\" rel=\"noopener\">first in-depth safety analysis comparing ddis to traditional diamond configurations<\/a>. after analyzing over 28 years worth of crash and other site data prior to ddi conversion and over 19 years of data post-ddi installation at seven u.s. locations, the group determined that:<\/p>\n<ul>\n<li>diverging diamond interchanges reduce the number of traffic crashes by 33 percent<\/li>\n<li>crashes resulting in injury and fatality are reduced by approximately 60 percent<\/li>\n<\/ul>\n<p>while it was the first research of its kind and more is likely necessary, all signs point to ddis as an efficient, effective, and most importantly, life-saving, intersection design. as they become more common, the unfamiliar will become second nature. with positive reviews from the federal highway administration, as well as communities and agencies throughout the country, ddis are on track to become the preferred method to route high volume traffic for years to come.<\/p>\n<p>reflecting on the interstate 35 &amp; east 1<sup>st<\/sup> street ddi configuration the snyder &amp; associates team helped design, greiman is excited to be a part of a project that will transform the safe, efficient movement of traffic for the <a href=\"https:\/\/www.ankenyiowa.gov\/\" target=\"_blank\" rel=\"noopener\">city of ankeny<\/a>, the <a href=\"https:\/\/www.iowadot.gov\/\" target=\"_blank\" rel=\"noopener\">iowa department of transportation<\/a>, and the traveling 世界杯足球比赛预选赛
.<\/p>\n<p>\u201cwe continually keep the goal of zero fatalities in mind as we design improvements for our nation\u2019s roadways. the ddi has reduced the possibility of vehicles backing up on the exit ramps as they move onto east 1<sup>st<\/sup> street, greatly improving traffic flow. it has also reduced rear-end collisions at this location,\u201d he shares. \u201cit\u2019s very rewarding to know that what we do today will serve the traveling 世界杯足球比赛预选赛
 well as ankeny continues to grow.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>innovative design of the diverging diamond interchange a fresh concept in interchange design, known as a diverging diamond interchange (ddi), or double crossover diamond interchange, takes traffic safety and efficiency to a new level. \u201cin a traditional diamond interchange, there are approximately 26 conflict points that can lead to traffic crashes,\u201d explains wade greiman, pe, [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":26393,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"footnotes":""},"categories":[28,27],"tags":[],"class_list":["post-245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-municipal-engineering","category-transportation"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- all in one seo pro 4.7.7.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"a diverging diamond interchange (ddi) increases the efficiency of traffic movement and enhances the safety of intersections.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"christy\"\/>\n\t<meta name=\"google-site-verification\" content=\"uyx92k6qrcyawl-137-fdbu2sp9azjvqvqvhs-4htb4\" \/>\n\t<link rel=\"canonical\" href=\"\/\/www.dicovercards.com\/diverging-diamond-interchange-benefits\/\" \/>\n\t<meta name=\"generator\" content=\"all in one seo pro (aioseo) 4.7.7.1\" \/>\n\n\t\t<!-- global site tag (gtag.js) - google analytics -->\n<script async src=\"https:\/\/www.dicovercards.com\/gtag\/js?id=ua-90528512-1\"><\/script>\n<script>\n window.datalayer = window.datalayer || [];\n function gtag(){datalayer.push(arguments);}\n gtag('js', new date());\n\n gtag('config', 'ua-90528512-1');\n<\/script>\n\t\t<meta property=\"og:locale\" content=\"en_us\" \/>\n\t\t<meta property=\"og:site_name\" content=\"snyder &amp; 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