Should we use SCATS MF to calibrate SIDRA Saturation Flow? We have published a new technical report on the use of the SCATS Maximum Flow (MF) parameter to calibrate SIDRA Saturation Flow: https://lnkd.in/gztBKEAr There has been an emerging trend for SIDRA users to calibrate Saturation Flow in modelling existing signalised intersections to match the value of Maximum Flow measured and recorded in the SCATS traffic control system (SCATS MF). While the concept of SCATS MF is similar to Saturation Flow, there are significant differences in how they are measured and applied. The report discusses in detail that valid values of SCATS MF are not available for many lanes, and where they are available, there are serious problems in translating SCATS MF to a reliable Saturation Flow value. Consequently, it recommends that SCATS MF should not be used to calibrate SIDRA models. Instead, standard values of Basic Saturation Flow should be used, and models should be calibrated and validated against observed traffic performance measures. We thank our colleague David Nash for the research he conducted for the findings included in this report. We also published this video on this topic on a presentation by David Nash at the AITPM Online Technical Conference Series November 2022. https://lnkd.in/gdsX2vTs #SidraIntersection #Infrastructure #Transportation #TrafficManagement #RoadSafety #UrbanDevelopment #Australia #SmartCity #PublicTransportation #Sustainability #TrafficEngineering #UrbanPlanning #CityGrowth #TrafficSolutions #Innovation #TransportNetwork #InfrastructureDevelopment #EfficientTransport #CommunityDevelopment #SustainableCities #ModernUrbanization #RoadImprovement #TrafficFlow #Connectivity #MobilitySolutions #GreenInfrastructure #Progress #FutureCity
SIDRA SOLUTIONS’ Post
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Traffic Signals | SCATS | Traffic Modelling | Transport Network Management & Optimisation
💭 Very interesting topic to have a read! 🚦 Whilst SIDRA is a lane-based traffic analysis and research tool, SCATS is an adaptive traffic signal control system with complex variation routines and operational features, therefore it would still be differences between SIDRA modelling and SCATS actual operations even after undertaking calibration and validation, especially for the modelling of future scenarios. How to utilise SCATS collected data to create and build more meaningful traffic models is always interesting. 💡 'All models are wrong some are useful'.
Should we use SCATS MF to calibrate SIDRA Saturation Flow? We have published a new technical report on the use of the SCATS Maximum Flow (MF) parameter to calibrate SIDRA Saturation Flow: https://lnkd.in/gztBKEAr There has been an emerging trend for SIDRA users to calibrate Saturation Flow in modelling existing signalised intersections to match the value of Maximum Flow measured and recorded in the SCATS traffic control system (SCATS MF). While the concept of SCATS MF is similar to Saturation Flow, there are significant differences in how they are measured and applied. The report discusses in detail that valid values of SCATS MF are not available for many lanes, and where they are available, there are serious problems in translating SCATS MF to a reliable Saturation Flow value. Consequently, it recommends that SCATS MF should not be used to calibrate SIDRA models. Instead, standard values of Basic Saturation Flow should be used, and models should be calibrated and validated against observed traffic performance measures. We thank our colleague David Nash for the research he conducted for the findings included in this report. We also published this video on this topic on a presentation by David Nash at the AITPM Online Technical Conference Series November 2022. https://lnkd.in/gdsX2vTs #SidraIntersection #Infrastructure #Transportation #TrafficManagement #RoadSafety #UrbanDevelopment #Australia #SmartCity #PublicTransportation #Sustainability #TrafficEngineering #UrbanPlanning #CityGrowth #TrafficSolutions #Innovation #TransportNetwork #InfrastructureDevelopment #EfficientTransport #CommunityDevelopment #SustainableCities #ModernUrbanization #RoadImprovement #TrafficFlow #Connectivity #MobilitySolutions #GreenInfrastructure #Progress #FutureCity
Should we use SCATS MF to calibrate SIDRA Saturation Flow?
sidrasolutions.com
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Please help us gather information to update this important resource! Let me know if you have any questions.
ITE and the Pedestrian and Bicycle Information Center (PBIC) are seeking current #pedestrian and bicycle project cost data from your city or state. This Federal Highway Administration-supported project will benefit public agencies and transportation planning professionals by updating the 2013 Costs for Pedestrian and Bicycle Infrastructure Improvements: A Resource for Researchers, Engineers, Planners, and the General Public. The cost data categories are included on this spreadsheet; if you are able to provide data for any of these categories, please contact Luana Ozelim Broshears by May 17, 2024. https://lnkd.in/ej7rVTvi
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Consider contributing to this much-needed guidance update!
ITE and the Pedestrian and Bicycle Information Center (PBIC) are seeking current #pedestrian and bicycle project cost data from your city or state. This Federal Highway Administration-supported project will benefit public agencies and transportation planning professionals by updating the 2013 Costs for Pedestrian and Bicycle Infrastructure Improvements: A Resource for Researchers, Engineers, Planners, and the General Public. The cost data categories are included on this spreadsheet; if you are able to provide data for any of these categories, please contact Luana Ozelim Broshears by May 17, 2024. https://lnkd.in/ej7rVTvi
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A new TAC publication, "Access Management: Synthesis of Practice,” is now available! The report synthesizes current access management practices for roadway classifications in rural, suburban, and urban areas for transportation practitioners, designers, and planners. “Access Management: Synthesis of Practice” is the first step toward updating “Chapter 8 – Access” of TAC’s "Geometric Design Guide for Canadian Roads" (GDG). While the report confirms that the guidance in GDG Chapter 8 is generally comprehensive, several emerging practices regarding safety, multimodal integration, on-site strategies, functional area, and context considerations warrant further review in a future chapter update. Read the article to learn more and download the PDF: https://lnkd.in/ebmzmUUP
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#mdpiforecasting #openaccess Article "Forecasting Daily and Weekly Passenger Demand for Urban Rail Transit Stations Based on a Time Series Model Approach", feature paper from Prof. Dr. Weiya Chen from Central South University 🔗 https://lnkd.in/d4RxrVPp #urbanrailtransit #URT #passengerdemandforecasting #BoxJenkin #FacebookProphetalgorithm #timeseries
Forecasting Daily and Weekly Passenger Demand for Urban Rail Transit Stations Based on a Time Series Model Approach
mdpi.com
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[EN] pengling wang, Xioafang Xiao, and Nils Nießen have published the peer reviewed #article "Flexible rolling stock composition strategy in urban rail transit lines: The influences of various train units and station capacities" in Transport Research Part C: Emerging Technologies (Volume 162) by Elsevier. The article can be viewed and downloaded in full as free access before May 29, 2024: https://lnkd.in/euBVy9ZM Highlights - A service-oriented #optimization of rolling stock circulation and #metro timetable. - The flexible rolling stock compositions are considered. - A #MILP model is built to reduce the number of stranded #passengers and the operational costs. - Influences of #train unit types, headways, and station capacities are studied. [DE] pengling wang, Xiaofang Xiao und Nils Nießen haben den peer-reviewed Artikel "Flexible rolling stock composition strategy in urban rail transit lines: The influences of various train units and station capacities" in Transport Research Part C: Emerging Technologies (Volume 162) von Elsevier veröffentlicht. Der Artikel kann bis zum 29. Mai 2024 im Volltext eingesehen und heruntergeladen werden: https://lnkd.in/euBVy9ZM
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📢 Exciting News: My research paper, "An Integrated Approach to Assess Pavement Condition by Integrated Survey Vehicle as Replacement of Manual Assessment," is now published in Springer Proceeding! Our work explores how an Integrated Survey Vehicle (ISV) can revolutionize pavement assessment, offering efficiency, accuracy, and cost-saving benefits. This innovation has the potential to reshape infrastructure management. Thanks to the amazing team and Springer Proceeding for making this possible. You can find the full paper on their platform. Feel free to reach out for discussions. Let's shape the future of pavement assessment! 🚀🛣️ #researchpaper #infrastructure #isv #innovation #springernature
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I've been running this non-scientific poll since the start of the ITE—A Community of Transportation Professionals 2024 conference. I was looking to test the results Gavin Jeter and I gathered last year where there was a bias towards signs, lines and markings, but also (oddly) geometric intervention (via superelevation). I'm pleased to see this year's results favor less expensive and hence more widely deployable solutions. I want to reiterate, this was a quick and dirty survey and it's difficult to draw many conclusions. And before you ask, I could only list 5 options so yes if I could have, I would have listed many more. 😉 What is your preferred countermeasure for roadway departures (RwD)? #safesystem
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May #ServiceChanges begin TOMORROW! RTD is implementing service changes starting May 26 to increase reliability, improve on-time performance, address seasonal school adjustments, and accommodate rail reconstruction projects. Learn more: https://rtdden.co/4bhwMFk
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