Chapter 7 _2_

Chapter 7 _2_ - Intersection Control and Signalization:...

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Intersection Control and Signalization: Concept and Analysis Control conflicting traffic and pedestrian movements at grade crossings
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ECI 161 Winter 12 Signalized Intersection Analysis Two approaches: s Deterministic arrivals (Use D/D/1) s Probabilistic arrivals (Use empirical equations) Quantifying delay: • Delay can be expressed as – Total delay in vehicle-hours or person-hours – Average delay per vehicle (seconds per vehicle)
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ECI 161 Winter 12 D/D/1 Signal Analysis: λ C > μ g (Oversatuaration)
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ECI 161 Winter 12 Arrival Rate Departure Rate Time Vehicles Maximum delay Maximum queue Total vehicle delay per cycle for the lane or the group of lanes Red Red Red Green Green Green Queue dissipation D/D/1 Signal Analysis: λ C< μ g (undersaturation) μ μ λ
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ECI 161 Winter 12 s Time to queue dissipation s Proportion of the cycle with a queue s Proportion of vehicles stopped μ λ ρ = 0 . 1 < ( 29 - = 1 r t c C t r P c q + = ( 29 ( 29 q c c s P C t r g r t r P = + = + + = ( 29 ( 29 C t
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This note was uploaded on 03/10/2012 for the course ECI 161 taught by Professor Tafazzoli during the Winter '12 term at UC Davis.

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Chapter 7 _2_ - Intersection Control and Signalization:...

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