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Traffic engineering miscellaneous

Traffic Engineering

  1. A roundabout is provided with an average entry width of 8.4 m, width of weaving section as 14 m and length of the weaving section between channelizing islands as 35 m. The crossing traffic and total traffic on the weaving section are 1000 and 2000 PCU per hour respectively. The nearest rounded capacity of the roundabout (in PCU per hour is)
    1. 3300
    2. 3700
    3. 4500
    4. 5200
Correct Option: B

Proportion of weaving traffic =
1000
= 0.5
2000

Capacity , QP = 280w1 +
e
(1 - P / 3)
w
1 +
w
L

= 280 × 141 +
8.4
1 - 0.5
143
1 +
14
35

= 3733.3 ≈ 3700 pcu



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