Page 126 - Lecture Notes DCC3113

Determine L,
L = [ℓ1 + ℓ2] + [(I1 – a1) + (I2 - a2)]
= [(2 + 2)] + [(4 – 3) + (4 – 3)]
= 6 saat

b. Optimum cycle time / Masa Pusingan Optima, Co = 1.5 L + 5
1 - Y
= 1.5 (6) + 5
1 - 0.65
= 40 s

c. Effective Green Time, g = Co - L
= 40 - 6
= 34 s

Effective Green Time for each phase, :

Phase 1 N/S : g(i) = y (N/S) x g = 0.21 x 34 = 11 s
y 0.65

Phase 2 E/W : g(ii) = y (E/W) x g = 0.44 x 34 = 23 s
y 0.65

Therefore, Actual Green Time /Masa hijau sebenar :

k = g (i) + (ℓ - a)

Phase 1 N/S : k1 = 11 + 2 - 3 = 10 s
Phase 2 E/W : k2 = 23 + 2 - 3 = 22 s

d. Traffic signal diagram:

Phase Diagram

K = 10 sec I = 4sec

GREEN a R RED
PHASE 1 GREEN
10sec 3s 1s 20sec
0 10 14 40
ℓ=2s g1 = 11sec

Optimum Cycle, Co = 40 sec

RED GREEN a R
PHASE 2 RED
14sec 22sec 3s 1s
0 10 14 40
Optimum Cycle, Co = 40 sec

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