Red- -Light Running Light Running Red Red-Light Running 2 - - PowerPoint PPT Presentation

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Red- -Light Running Light Running Red Red-Light Running 2 - - PowerPoint PPT Presentation

Nov 21, 2022 163 likes •568 views

Red- -Light Running Light Running Red Red-Light Running 2 Traffic Signals Traffic Signals Red-Light Running Intersection Fatalities Intersection Fatalities Red-Light Running 3 What is Red Light Running? What is Red Light Running?

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Red-Light Running

Red Red-

  • Light Running

Light Running

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Red-Light Running 2

Traffic Signals Traffic Signals

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Red-Light Running 3

Intersection Fatalities Intersection Fatalities

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Red-Light Running

What is Red Light Running? What is Red Light Running?

  • Permissive yellow rule:

– Driver can legally enter intersection during entire yellow interval – Violation occurs if driver enters intersection after onset of red

  • Restrictive yellow rule:

– Driver can neither enter nor be in intersection

  • n red

– Violation occurs if driver has not cleared intersection after onset of red

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Red-Light Running

Intersection Definition Intersection Definition

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Intersection

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Red-Light Running

Safety Facts About Red Safety Facts About Red-

  • Light Running

Light Running

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Source: Fatality Analysis Reporting System (FARS), http://www-fars.nhtsa.dot.gov

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Red-Light Running

Safety Facts About Red Safety Facts About Red-

  • Light Running

Light Running

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Source: Establishing a Uniform Definition of Red-Light Running Crashes, ITE Journal, March 2006

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Red-Light Running

Safety Facts About Red Safety Facts About Red-

  • Light Running

Light Running

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  • Red-light running crashes are more likely than
  • ther crashes to cause injury
  • On urban roads, fatal RLR crashes are more likely

than other fatal crashes

  • Fatal RLR crashes are somewhat more likely to
  • ccur during the day

Source: Prevalence and Characteristics of Red Light Running Crashes in the United States, Accident Analysis and Prevention, 1999

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Red-Light Running

Types of Crashes Types of Crashes

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Right angle Right angle Rear end Rear end Left turn Left turn

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Red-Light Running

Red Red-

  • Light Running Studies

Light Running Studies

4% of Americans reported running red lights

1% run them “often” 3% run them “sometimes”

97% of drivers feel that other drivers running red lights are a major safety threat 1 in 3 people claim they personally know someone injured or killed in a red light running crash

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Red-Light Running

Types of Red Types of Red-

  • Light Runners

Light Runners

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Red-Light Running

Effective Programs Effective Programs

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Red-Light Running

Possible Causes and Countermeasures Possible Causes and Countermeasures

Possible Cause of RLR Engineering Enforcement Education Did not see signal

  • ◊

Tried to beat yellow ◊

  • Reported they had green
  • Intentional violation

◊

  • Unable to stop vehicle
  • ◊

Followed another vehicle

  • Confused by signal
  • ◊

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  • = Likely countermeasure

◊ = Possible countermeasure

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Red-Light Running

The First Step The First Step

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Red-Light Running

Intersection Safety Resources Intersection Safety Resources

  • NCHRP Report 500 Volume 12
  • Guide sheets
  • Safety Strategies brochure
  • Signalized Intersections: Informational Guide

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Red-Light Running

Red Red-

  • Light Running Resources

Light Running Resources

  • Red Light Camera Systems: Operational Guidelines
  • Making Intersections Safer: A Toolbox…
  • Field Guide for Inspecting Signalized Intersections…

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Red-Light Running

Engineering Countermeasures Engineering Countermeasures

  • Improve signal visibility
  • Improve line of sight
  • Improve signal conspicuity
  • Increase likelihood of stopping
  • Improve signal timing
  • Eliminate the need to stop

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Red-Light Running

Improve Signal Visibility Improve Signal Visibility

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Red-Light Running

Improve Signal Visibility Improve Signal Visibility

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Red-Light Running

Improve Line of Sight Improve Line of Sight

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Red-Light Running

Improve Signal Conspicuity Improve Signal Conspicuity

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Red-Light Running

Improve Signal Conspicuity Improve Signal Conspicuity

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Red-Light Running

Improve Signal Conspicuity Improve Signal Conspicuity

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Red-Light Running

Increase Likelihood of Stopping Increase Likelihood of Stopping

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Red-Light Running 25

Increase Likelihood of Stopping Increase Likelihood of Stopping

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Red-Light Running 26

Increase Likelihood of Stopping Increase Likelihood of Stopping

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Red-Light Running

Improve Signal Timing Improve Signal Timing

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Red-Light Running 28

Improve Signal Timing Improve Signal Timing

Gg d V t Y 2 2 47 . 1

85

   

2 2 85

ft/s 32.2 gravity to due

  • n

accelerati g ft/ft in grade G 10ft/s

  • n

decelerati mi/h in speed percentile 85th s 1 time reaction seconds in duration yellow          d V t Y

Equation for determining adequate yellow time

where

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Red-Light Running

Improve Signal Timing Improve Signal Timing

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Red-Light Running

Eliminate the Need to Stop Eliminate the Need to Stop

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Red-Light Running

Eliminate the Need to Stop Eliminate the Need to Stop

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Red-Light Running

The Next Step The Next Step

  • Follow up countermeasures with

Follow up countermeasures with

  • bservation
  • bservation
  • Number of red light runners can be

Number of red light runners can be surrogate for improved safety surrogate for improved safety

  • If unsuccessful, look towards

If unsuccessful, look towards enforcement countermeasures enforcement countermeasures

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Red-Light Running 33

Enforcement Countermeasures Enforcement Countermeasures

  • Increased enforcement
  • Enforcement assistance lights
  • Automated enforcement
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Red-Light Running

Increased Enforcement Increased Enforcement

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Red-Light Running

Enforcement Assistance Lights Enforcement Assistance Lights

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Red-Light Running

Automated Enforcement Automated Enforcement

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Red-Light Running

Red Light Cameras Red Light Cameras

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Source: Insurance Institute for Highway Safety web site (www.iihs.org)

WA OR CA AZ CO NM TX SD IA MO IL LA MS AL GA FL TN NC OH NY PA MD DE RI DC

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Red-Light Running 38

Education Countermeasures Education Countermeasures

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Red-Light Running 39

For More Information For More Information

  • FHWA Office of Safety

– http://safety.fhwa.dot.gov/

  • Insurance Institute for Highway Safety

– http://www.iihs.org/

  • Institute of Transportation Engineers

– http://www.ite.org/safety/

  • American Association of State Highway and Transportation

Officials

– http://safety.transportation.org/

  • Red Means Stop Coalition

– http://www.redmeansstop.org/