Signal Operations

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Signal Operations

• Real Intersection Design

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Intersection ControlBasic Rules of the Road
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Intersection ControlYield and Stop Control
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Intersection ControlTraffic Signal
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How?

• MUTCD by FHWA
• Warrant Analysis
• 8-hr Vehicular Volume
• 4-hr Vehicular Volume
• Peak Hour
• Pedestrian Volume
• School Crossing
• Coordinated Signal System
• Crash Experience
• Roadway Network

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Visibility
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Measure of Effectiveness Vehicles

• Delay
• LOS A-F

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Ped Delay LOS

• A lt10 sec.
• B 10-20
• C 21-30
• D 31-40
• E 41-60
• F gt 60

• When pedestrians experience more than a 30
  second delay, they become impatient, and engage
  in risk-taking behavior.

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Adequate All-red Interval
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Leading Pedestrian Intervals
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Scramble
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Credits

• Kim Eccles, BMI-SG, Vienna VA, keccles_at_bmisg.com
• Martin Livingston, Burlington County NJ,
  mlivingston_at_co.burlington.nj.us
• Michael King, Traffic Calmer, Brooklyn NY,
  miking_at_trafficcalmer.com
• Susan Lim, Arup
• NY, susan.lim_at_arup.com