March 16 Presentation final

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 ???