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The overview covers when a Traffic Impact Study (TIS) or an area-wide study fee is warranted based on net increase thresholds, plus credit for existing uses and previous approvals. It also details the Auxiliary Lane Worksheet inputs, comparing rates and fitted curve equations using ITE Trip Generation Manual guidance, and highlights updates from the ITE 12th Edition.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/traffic-generation-diagrams-purpose-rates-vs-equations-auxiliary-lane-worksheet/657487/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/traffic-generation-diagrams-purpose-rates-vs-equations-auxiliary-lane-worksheet/657487.png","ImageObject",300,407,{"name":92,"@type":93},"bocahgabuttt","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-26",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What triggers the need for a Traffic Impact Study or area-wide study fee in the TGDs process?","Question",{"text":112,"@type":113},"A Traffic Impact Study (TIS) or area-wide study fee may be warranted based on DCM Section 2.2.2 criteria, including a net increase greater than 500 vpd or 50 vph, along with local land use agency requirements and related DCM sections.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What inputs are required for the Auxiliary Lane Worksheet?",{"text":117,"@type":113},"The Auxiliary Lane Worksheet requires road traffic data and turning movements, with methodology referenced to DCM Section 5.2.9.",{"name":119,"@type":110,"acceptedAnswer":120},"How do the TGDs approach rates versus fitted curve equations using the ITE manual?",{"text":121,"@type":113},"The guidance uses ITE Trip Generation Manual Handbook (3rd Edition, Figure 4.2): when there are 20 or more data points, a fitted curve equation is used; with five or fewer data points, local data must be collected.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},657487,1793100979,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":46,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":31},962094248839,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Traffic Generation Diagrams  \nSeptember 18, 2025  \nPresented By:  \nJoanne Arellano, PE, PTOE, PTP (JMT)  \nTanner Chiamprasert, EIT (JMT)  \nPresentation Overview  \n> Traffic Generation Diagrams (TGDs)> Purpose  \n> Required Information> Auxiliary Lane Worksheet> Trip Generation  \n> Rates vs. Equations  \n> Pass-By  \n> Internal Capture  \nTraffic Generation Diagrams  \nPurpose  \n• Requirement of Entrance Plan Submissions  \n• DCM Section 3.4.2  \n• Requirement of Pre-Submittal Meeting  \n• Access should be shown onto a 3-digit state-maintained roadway  \nTraffic Generation Diagrams  \nPurpose  \n• Traffic Impact Study (TIS) or Area-Wide Study Fee  \n• DCM Section 2.2.2 Traffic Impact Studies – Warrants  \n• Net Increase >500 vpd or 50 vph  \n• Local Land Use Agency requirements  \n• DCM Section [2.2.2.2](2.2.2.2) Area-Wide Study Fee  \n• Net Increase \u003C2,000 vpd and 200 vph  \n• Credit for Existing Uses/Previous Approvals  \nTraffic Generation Diagrams  \nPurpose  \n• Auxiliary Lane Worksheet  \n• Inputs Needed:  \n• Road Traffic Data  \n• Turning Movements  \n• DCM Section 5.2.9 – Methodology  \nTraffic Generation Diagrams  \nPurpose  \n• Auxiliary Lane Worksheet  \n• Inputs Needed:  \n• Road Traffic Data  \n• Turning Movements  \n• DCM Section 5.2.9 – Methodology  \nRates vs. Fitted Curve Equations  \n• Per ITE Trip Generation Manual Handbook 3rd Edition (Figure 4.2)  \n• 20 or more data points, Fitted Curve Equation  \n• Five or less data points, collect local data  \n• Additional data with every new edition of ITE Trip Generation  \n• Previously accepted practices could be revisited  \nITE 12th Edition  \n• Released August 18, 2025  \n• Over 550 new study sites added across the land uses  \n• Removed all pre-1990 data  \n• New land use codes, including travel centers and high-volume fast-food restaurants  \n• Revised land use definitions and updated independent variables  \nTraffic Generation Diagram Road Traffic Data  \nUse Latest DelDOT Traffic Summary!!!","cbCaiiwYJ2Ib9i1C","https://ap.wps.com/l/cbCaiiwYJ2Ib9i1C","pdf",1524337,"English","# Presentation Overview\n## Traffic Generation Diagrams: Purpose\n## Auxiliary Lane Worksheet\n## Rates vs. Fitted Curve Equations\n## Pass-By\n## Internal Capture\n## Traffic Generation Diagram: Road Traffic Data","[{\"question\":\"What triggers the need for a Traffic Impact Study or area-wide study fee in the TGDs process?\",\"answer\":\"A Traffic Impact Study (TIS) or area-wide study fee may be warranted based on DCM Section 2.2.2 criteria, including a net increase greater than 500 vpd or 50 vph, along with local land use agency requirements and related DCM sections.\"},{\"question\":\"What inputs are required for the Auxiliary Lane Worksheet?\",\"answer\":\"The Auxiliary Lane Worksheet requires road traffic data and turning movements, with methodology referenced to DCM Section 5.2.9.\"},{\"question\":\"How do the TGDs approach rates versus fitted curve equations using the ITE manual?\",\"answer\":\"The guidance uses ITE Trip Generation Manual Handbook (3rd Edition, Figure 4.2): when there are 20 or more data points, a fitted curve equation is used; with five or fewer data points, local data must be collected.\"}]","Traffic Generation Diagrams - Purpose - Rates vs. Equations - Auxiliary Lane Worksheet | PDF",1792980991]