Transcript
MnDOT-Metro Maintenance
Spinning out of control
As MnDOT invests in building bigger and safer bridges to accommodate future growth in Metro area….Question: What are the most effective solutions available to reduce weather related crashes?
Answer:Flat straight bridgeChip seal bridge deckAnti-icing SystemThermal Deicing Driver’s Education Advanced Warning Flashers
Anti-icing System Selection Process (internal)
Accidents / AADT / Traffic backups
Snow Storage / # of lanesHorizontal & Vertical alignmentEnvironment & waterShadowing / Wind
Potential Candidates
Benefits and Concerns
Safety …TZDProactive timely responseEffective & efficient application
Complex systemOngoing operation &
maintenanceHoles in Bridge
Design Process
Seek feedback from TSCommunicate with PMs / Area
EngineersSubmit RFP for potential biddersReview shop drawings
Anti-icing Operations & Maintenance
Summer & Fall annual inspectionsMonitor warning msgs. Replacement for parts
Project Level Risk Assessment Tool
In 2012, MnDOT Risk Assessment Review Team agreed upon the following GOAL:
“Anti-icing systems or services are common sense and environmentally sound strategies that result in greater safety while cost effectively managing ice issues without shortening the life of bridge structures and roadway investments'.”
System components
Research & Field Data
16% – 70%
68%
66%
Let the Numbers speak
ConclusionAnti-icing is one of many tools in our tool box to provide safe roadways and bridges.
Discussion and Questions ???
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