Regional Operations Forum Safety and Operations Linking Safety and - - PowerPoint PPT Presentation

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Regional Operations Forum Safety and Operations Linking Safety and - - PowerPoint PPT Presentation

Mar 24, 2024 279 likes •703 views

Accelerating solutions for highway safety, renewal, reliability, and capacity Regional Operations Forum Safety and Operations Linking Safety and Operations State DOTs facing numerous challenges Prior to ISTEA, DOTs focused separately on

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Regional Operations Forum Safety and Operations

Accelerating solutions for highway safety, renewal, reliability, and capacity

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Linking Safety and Operations

  • State DOTs facing numerous challenges
  • Prior to ISTEA, DOTs focused separately on

– Construction – Maintenance – Operations – Safety

  • Limited resources has shifted focus

– Operating and maintaining system

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Why Link Safety and Operations?

  • Highway fatalities and serious injuries at

unacceptable levels

  • 29,757 fatalities in 2011

– Press coverage not significant for highway fatalities – Boeing 747-400 carries 520 passengers – 2011 highway fatalities = 56 airline crashes

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U.S. Fatal Crash Trends

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Source: NHTSA FARS Data

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VMT Trends

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Source: NHTSA FARS Data

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Fatal Crash Rate Trends

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Source: NHTSA FARS Data

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U.S. Injury Crash Trends

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Injury Crash Rate Trends

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Traffic Congestion

  • Congestion continues to plague our

transportation system – 2.9 billion gallons of wasted fuel

  • Enough to fill 4 superdomes

– 5.5 billion hours of wasted time

  • Significantly impacts communities

– Quality of life – Safety – Health

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Types of Traffic Congestion

  • Recurring congestion

– Predictable in cause

  • Location
  • Time of day
  • Duration

– Surge overwhelms roadway’s capacity – Examples

  • Lane drops, grades, narrow lanes
  • Poorly timed traffic signals

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Types of Traffic Congestion

  • Non-recurring congestion

– Unpredictable in nature

  • Location
  • Time of day
  • Duration

– Examples

  • Crashes, disabled vehicles, weather
  • Work zones and planned special events
  • Dramatically reduces capacity and reliability

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MAP-21 Requirements

  • Creates national goals and performance

management measures – Safety – Congestion reduction – System reliability

  • Performance targets currently being developed

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Safety and Throughput

  • Low cost operational improvements can create

significant improvements in traffic flow – Equate to having safer roads

  • Low cost operational improvements

– Signal phasing (permissive vs. protected) – Signal timings and progression – Appropriate clearance intervals – Pavement markings, signing, and delineation – Installation or extension of turn lane

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DETERMINING WHERE SAFETY AND OPERATIONS ARE MOST EFFECTIVE

Opportunities to Affect Safety and Operations

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Static Data

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Real Time Data Acquisition

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Real Time Data Acquisition

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Real Time Data Acquisition

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Real Time Data Acquisition

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Roadway Weather Information

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ANALYSIS TECHNIQUES

Opportunities to Affect Safety and Operations

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Crash Locations Through GIS

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Intersection Crash Analysis

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Crash Density Maps

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Peak Hour Travel Time Index

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Crash Density with AM Peak Travel Time Index

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Project Examples

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Median/Pedestrian Refuge

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Road Diets

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Access Management

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Turn Lanes

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Signal Timing and Improvements

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Ramp Metering

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Variable Speed Limits

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Adaptive Signal Timing

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Advanced Traveler Information Systems

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Incident Management

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End of Queue Detection Systems

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Advanced Traffic Management

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SHRP 2 Project L07

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Group Discussion

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