How to Get Accurate Forecasts for Reducing Weight Limits Wayne - PowerPoint PPT Presentation

Jun 20, 2023 •208 likes •625 views

How to Get Accurate Forecasts for Reducing Weight Limits Wayne Schoonover Mason CRC Manager/Director Sean Thorpe CTT Roadsoft Software Engineer Agenda Thaw weakening Thawcaster origin Walk through Questions Why Spring Load

How to Get Accurate Forecasts for Reducing Weight Limits Wayne Schoonover – Mason CRC Manager/Director Sean Thorpe – CTT Roadsoft Software Engineer
Agenda • Thaw weakening • Thawcaster origin • Walk through • Questions
Why Spring Load Restrictions?
Thaw Weakening! Strength Restrict Load Winter Spring Summer Fall From FHWA Guidelines for Spring Highway Use Restrictions
Terms Freezing Index (FI) Thawing Index (TI) Thawing Index using Minnesota Method (TI*)
Start Counting FI
When to Put Restriction on Table 2 Thawing Index ( o F-days) Pavement BST/Asphalt Concrete Base Course Should Must Structure Thickness (inches) Thickness (inches) Level Level • Thin 2” or less 6” or less 10 40 • Thick Greater than 2” Greater than 6” 25 50 From FHWA Guidelines for Spring Highway Use Restrictions
When to Take Restrictions Off Guidelines state when TI = 0.3 X FI 0.3 X FI is approximately when it is thawed
Start Counting TI
0.3 X FI Is Not when it stops bleeding and settled back down! Use visual judgement and experience
WEATHER FORECASTING: IN THE BEGINNING …
Origin Program Overview Data collection Tools User setup Upcoming plans
How did LTAP get involved?
Thawcaster Basic Historic data and forecasts FI, TI, TI* web based tracking tool Data stored in cloud Desktop and mobile ready
Thawcaster Advanced Worst case forecast scenarios Forecast site error rates Data exports for custom analysis
What Thawcaster does Not Not do A perfect fit for all soil types Replace engineering judgement Replace experience
Thawcaster Potential Data Sources Weather Underground Weather Unlocked NOAA Forecast IO Open Weather Map APIXU
Thawcaster Data Collection Data initially collected from a single provider Eventually collected from multiple providers Collected via weather web API Stored in database
Tools Thawcast Historical annual Thawcast Weather station error analysis
Thawcast
Thawcast Tracker
Historical Annual Thawcast
Weather Station Error Rate
Weather Station Error Rate
Weather Station Error Rate
User Setup
Station List
Station Map
Weather Stations • Create account • Request weather station by zip code • Data will automatically be gathered using available data providers (initially a single provider)
Thawcaster Initial Release 2/20/17 • Request station by zip code • Thawcast for current weather forecast • FI/TI data for the current season • Data export • Add comments
Additional Release Plans • Multiple data providers • Editable Thawcast or making custom projections • Annual historical Thawcast for years past • Comprehensive weather station error analysis
Questions and Ideas? ctt@mtu.edu Phone: (906) 487-2102

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