{"id":26904,"date":"2025-04-09T09:43:38","date_gmt":"2025-04-09T07:43:38","guid":{"rendered":"https:\/\/blog.ptvgroup.com\/?p=26904"},"modified":"2025-06-11T15:18:49","modified_gmt":"2025-06-11T13:18:49","slug":"bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling","status":"publish","type":"post","link":"https:\/\/blog.ptvgroup.com\/en\/modeling-planning\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\/","title":{"rendered":"Bordeaux Metropole\u2019s New Approach to Bicycle Traffic Modeling"},"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\" style=\"flex-basis:66.66%\">\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table of contents<\/h2><ul><li><a href=\"#h-the-challenges-of-bicycle-traffic-modeling\" data-level=\"2\">The Challenges of Bicycle Traffic Modeling<\/a><\/li><li><a href=\"#h-collecting-data-for-a-more-accurate-model\" data-level=\"2\">Collecting Data for a More Accurate Model<\/a><\/li><li><a href=\"#h-key-findings-and-insights\" data-level=\"2\">Key Findings and Insights<\/a><\/li><li><a href=\"#h-updating-bordeaux-s-transport-model\" data-level=\"2\">Updating Bordeaux\u2019s Transport Model<\/a><\/li><li><a href=\"#h-future-prospects-for-bicycle-traffic-modeling\" data-level=\"2\">Future Prospects for Bicycle Traffic Modeling<\/a><\/li><\/ul><\/div>\n\n\n\n<p>As cities continue to evolve towards more sustainable mobility solutions, cycling is gaining importance. <a href=\"https:\/\/blog.ptvgroup.com\/en\/trend-topics\/the-most-bike-friendly-cities-in-the-world\/\" target=\"_blank\" rel=\"noreferrer noopener\">Bicycle-friendly cities<\/a> such as Copenhagen and Utrecht demonstrate the significance of well-planned and safe infrastructure in promoting cycling. As the role of bicycles in transport planning grows, so does the need for detailed and accurate representation in transport models.<\/p>\n\n\n\n<p>However, data on bicycle traffic is often lacking. A project in the Bordeaux Region in France addressed this issue, enhancing the informative value of traffic models concerning cycling.<\/p>\n\n\n\n<p>\u201cOur goal was to enhance Bordeaux Metropole\u2019s multimodal transport model (MMM33) by improving the representation of cyclists in both route choice and mode choice,\u201d says <a href=\"https:\/\/www.linkedin.com\/in\/bastien-guichardaz-993567248\/\">Bastien Guichardaz<\/a> from the PTV Group team in France.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-challenges-of-bicycle-traffic-modeling\"><strong>The Challenges of Bicycle Traffic Modeling<\/strong><\/h2>\n\n\n\n<p>Traditionally, cyclists in traffic models have been represented with a fixed speed, often overlooking the impact of dedicated infrastructure. This simplistic approach is becoming increasingly inadequate as bicycle usage grows, particularly with the rise of e-bikes. The challenge lies in the lack of detailed data on bicycle speeds, which impacts travel time calculations &#8211; a crucial component of transportation models.<\/p>\n\n\n\n<p>\u201cSpeed determines travel time, and travel time is the key indicator in models to compute trip destinations, mode choice, and route choice,\u201d explains Bastien Guichardaz.<\/p>\n\n\n\n<p>Unlike cars and public transport, which benefit from extensive datasets, cycling data has historically been scarce. The absence of enforced speed limits and the numerous factors influencing cyclist speed, such as road conditions, infrastructure, and rider experience, make it difficult to establish reliable models.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cFor reliable transport models, we need reliable data,\u201d Bastien adds.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-collecting-data-for-a-more-accurate-model\"><strong>Collecting Data for a More Accurate Model<\/strong><\/h2>\n\n\n\n<p>To address these gaps, the project team recruited a panel of cyclists who provided GPS records of their bicycle trips. Participants also completed surveys detailing their personal characteristics. \u201cThis cycling data collection method enabled a comprehensive analysis of trip length, speed, and infrastructure usage,\u201d says the PTV expert.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-findings-and-insights\"><strong>Key Findings and Insights<\/strong><\/h2>\n\n\n\n<p>The analysis confirmed that factors like age, terrain inclination, and bicycle type significantly influence speed, aligning with existing literature. However, some unexpected insights emerged.<\/p>\n\n\n\n<p>Bastien Guichardaz states: \u201cWe were surprised by the influence infrastructure has. The base speeds identified in our analysis were quite different from the assumptions used in models so far.\u201d<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"662\" height=\"364\" src=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2025\/03\/Bordeaux-cycling-path.png\" alt=\"\" class=\"wp-image-26908\" srcset=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2025\/03\/Bordeaux-cycling-path.png 662w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2025\/03\/Bordeaux-cycling-path-640x352.png 640w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2025\/03\/Bordeaux-cycling-path-300x165.png 300w\" sizes=\"auto, (max-width: 662px) 100vw, 662px\" \/><\/figure>\n\n\n\n<p>In France, cyclists are allowed to use bus lanes, for example. The study found that cyclists tend to travel faster on these shared bus lanes, despite them not being the most bike-friendly infrastructure. This trend was consistent across all cyclist experience levels.<\/p>\n\n\n\n<p>\u201cOur interpretation is that shared lanes provide more space and overtaking opportunities, resulting in higher speeds.\u201d<\/p>\n\n\n\n<p>Another major finding was that cyclists do not always choose the shortest routes. Even after accounting for adjusted speeds based on infrastructure and inclination, the actual paths taken often deviated, indicating a preference for comfort and safety over pure efficiency. This behavior was particularly evident among beginner cyclists and e-bike users, who tended to take more significant detours to use dedicated infrastructure.<\/p>\n\n\n\n<p>\u201cOur survey paid particular attention to e-bikes, as they reduce physical effort, increase comfort, and allow for longer trips at higher speeds,\u201d explains Bastien Guichardaz. \u201cGiven their growing adoption in urban areas, it was essential to integrate them into the model to reflect their distinct characteristics. The collected data confirmed that e-bike users exhibit different route choices and speeds compared to conventional cyclists, reinforcing the need for differentiated modeling approaches.\u201d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-updating-bordeaux-s-transport-model\"><strong>Updating Bordeaux\u2019s Transport Model<\/strong><\/h2>\n\n\n\n<p>With the collected cycling data, planners developed a specific bicycle speed model and calibrate a comfort\/security bonus. Both were then integrated into Bordeaux Metropole\u2019s multimodal transport model, enhancing the accuracy of bicycle traffic representation. By refining speed predictions and incorporating infrastructure influences, this update ensures that cycling is modeled with the same reliability as private cars and public transport.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-future-prospects-for-bicycle-traffic-modeling\"><strong>Future Prospects for Bicycle Traffic Modeling<\/strong><\/h2>\n\n\n\n<p>The enhanced model provides Bordeaux Metropole with a more robust tool for traffic planning. With improved reliability, transport planners can confidently assess the impact of new cycling infrastructure and implement policies that encourage bicycle usage. This advancement not only supports sustainable mobility goals but also enhances overall urban traffic management by integrating bicycles as a fully recognized mode of transportation.<\/p>\n\n\n\n<p>As other cities seek to expand their cycling infrastructure, Bordeaux\u2019s approach serves as a benchmark for leveraging data-driven insights to improve bicycle traffic modeling, ultimately fostering safer and more efficient urban mobility solutions.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column cta-box is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<div class=\"wp-block-cover\"><img loading=\"lazy\" decoding=\"async\" width=\"1254\" height=\"836\" class=\"wp-block-cover__image-background wp-image-25406\" alt=\"\" src=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184.jpg\" data-object-fit=\"cover\" srcset=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184.jpg 1254w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-540x360.jpg 540w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-936x624.jpg 936w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-768x512.jpg 768w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-300x200.jpg 300w\" sizes=\"auto, (max-width: 1254px) 100vw, 1254px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-80 has-background-dim wp-block-cover__gradient-background has-background-gradient\" style=\"background:linear-gradient(135deg,rgb(66,104,249) 28%,rgb(41,224,133) 88%)\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-center\" style=\"font-size:24px;font-style:normal;font-weight:700\">Whitepaper: <strong>Bicycle Playbook<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center\">Download the Bicycle Playbook and find out what you can do to make your city more bicycle friendly.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-14c487f4 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-background-color has-text-color has-background has-link-color has-text-align-center has-custom-font-size wp-element-button\" href=\"https:\/\/www.ptvgroup.com\/en\/white-paper\/bicycle-playbook\" style=\"border-radius:8px;color:#6482f6;font-size:14px;font-style:normal;font-weight:500\" target=\"_blank\" rel=\"noreferrer noopener\">Read the full story<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-cover\" style=\"min-height:300px;aspect-ratio:unset;\"><img loading=\"lazy\" decoding=\"async\" width=\"1254\" height=\"836\" class=\"wp-block-cover__image-background wp-image-25406\" alt=\"\" src=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184.jpg\" data-object-fit=\"cover\" srcset=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184.jpg 1254w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-540x360.jpg 540w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-936x624.jpg 936w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-768x512.jpg 768w, https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2024\/10\/iStock-1312502184-300x200.jpg 300w\" sizes=\"auto, (max-width: 1254px) 100vw, 1254px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-80 has-background-dim wp-block-cover__gradient-background has-background-gradient\" style=\"background:linear-gradient(135deg,rgb(66,104,249) 28%,rgb(41,224,133) 88%)\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-center\" style=\"font-size:24px;font-style:normal;font-weight:700\">Get More People on Bikes!<\/p>\n\n\n\n<p class=\"has-text-align-center\">A well-planned and safe infrastructure is key to increasing cycling. PTV Visum helps <br>analyze potential measures in advance.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-14c487f4 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-background-color has-text-color has-background has-link-color has-text-align-center has-custom-font-size wp-element-button\" href=\"https:\/\/www.ptvgroup.com\/en\/products\/ptv-visum\" style=\"border-radius:4px;color:#6482f6;font-size:14px;font-style:normal;font-weight:700\" target=\"_blank\" rel=\"noreferrer noopener\">Discover PTV Visum<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p class=\"card-text\">To enhance the representation of bicycle traffic in its transport model, the city of Bordeaux launched a comprehensive cycling data collection initiative. [&#8230;]<\/p>\n<p class=\"m-0\"><a class=\"btn btn-outline-secondary btn-read-more\" href=\"https:\/\/blog.ptvgroup.com\/en\/modeling-planning\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\/\">Read More<\/a><\/p>\n","protected":false},"author":13,"featured_media":26906,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8326],"tags":[],"ppma_author":[8266],"class_list":["post-26904","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-modeling-planning"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>| PTV Blog<\/title>\n<meta name=\"description\" content=\"To enhance the representation of bicycle traffic in its transport model, the city of Bordeaux launched a cycling data collection initiative.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.ptvgroup.com\/en\/modeling-planning\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bordeaux Metropole\u2019s New Approach to Bicycle Traffic Modeling\" \/>\n<meta property=\"og:description\" content=\"To enhance the representation of bicycle traffic in its transport model, the city of Bordeaux launched a cycling data collection initiative.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.ptvgroup.com\/en\/modeling-planning\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\/\" \/>\n<meta property=\"og:site_name\" content=\"PTV Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/PTVGroupGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-09T07:43:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-11T13:18:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.ptvgroup.com\/wp-content\/uploads\/2025\/03\/Bordeaux.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1025\" \/>\n\t<meta property=\"og:image:height\" content=\"577\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Stefanie Schmidt\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Stefanie Schmidt\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blog.ptvgroup.com\\\/en\\\/modeling-planning\\\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blog.ptvgroup.com\\\/en\\\/modeling-planning\\\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\\\/\"},\"author\":{\"name\":\"Stefanie Schmidt\",\"@id\":\"https:\\\/\\\/blog.ptvgroup.com\\\/en\\\/#\\\/schema\\\/person\\\/01208bd7993998162da7dfccc5431421\"},\"headline\":\"Bordeaux Metropole\u2019s New Approach to Bicycle Traffic Modeling\",\"datePublished\":\"2025-04-09T07:43:38+00:00\",\"dateModified\":\"2025-06-11T13:18:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blog.ptvgroup.com\\\/en\\\/modeling-planning\\\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\\\/\"},\"wordCount\":820,\"publisher\":{\"@id\":\"https:\\\/\\\/blog.ptvgroup.com\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/blog.ptvgroup.com\\\/en\\\/modeling-planning\\\/bordeaux-metropoles-new-approach-to-bicycle-traffic-modeling\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blog.ptvgroup.com\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/Bordeaux.png\",\"articleSection\":[\"Modeling &amp; 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