Part 7 Sand and Salt Calibration September 26, 2013. Community Innovation Challenge Grant 2013. Why did CMRSWC Address This?. Focus on chloride impairments is strong in NH, along I-93 corridor. Increased R&D into new deicing materials and methods in recent years.
Sand and Salt Calibration
September 26, 2013
Community Innovation Challenge Grant
Focus on chloride impairments is strong in NH, along I-93 corridor.
Increased R&D into new deicing materials and methods in recent years.
Project partner Oxford, MA had developed detailed calibration procedure, reduced total chloride application and cost. Other Towns interested in learning how they did it.
Develop a “decision tree” that would use information such as traffic conditions, pending weather, ambient temperature, and material melting temp to recommend loading (lbs per lane mile)
Captured “decision tree” information done elsewhere.
Developed “rough” loading estimate.
Documented Oxford’s detailed procedure.
- Total material used in year (tons and gallons)
- Total lane-miles managed
Disadvantages: doesn’t account for variation in loadings from different vehicles or differences in storm events; storm days not always known.
Disadvantage: Time consuming.
Advantage: Very accurate.
Choose a target delivery rate.
Review and document settings on each application device on vehicle.
Adjust settings to reduce delivery toward target.
Test reduced delivery rate during storm event, ensure that public safety is not impacted.
Continue to recalibrate and make additional reductions on an iterative basis.
Minnesota “Clipboard Sheet”
Cornell Application Rates