Civil Engineering - GATE Exam Questions - Discussion
Discussion Forum : GATE Exam Questions - Section 4 (Q.No. 8)
8.
A linear relationship is observed between speed and density on a certain section of a highway. The free flow speed is observed to be 80 km per hour and the jam density is estimated as 100 vehicles per km length. Based on the above relationship, the maximum flow expected on this section and the speed at the maximum flow will respectively be
Discussion:
4 comments Page 1 of 1.
Shivaprasad sajjan said:
7 years ago
Jam density (K_j).
Free flow speed (uf).
Therefore, max flow is given by = 1/4 * Kj * if.
=1/4 * 80 * 100.
= 2000veh/hr.
Speed = 80/2 = 40kmph.
Free flow speed (uf).
Therefore, max flow is given by = 1/4 * Kj * if.
=1/4 * 80 * 100.
= 2000veh/hr.
Speed = 80/2 = 40kmph.
Rocker said:
7 years ago
Why it is divide by 4 here?
Chhaya said:
8 years ago
Thanks @Deepak.
DEEPAK PRAJAPATI said:
1 decade ago
Maximum flow = (free flow*jam density)/4.
(80*100)/4 = 2000 vehicles per hour.
Speed = Free flow speed / 2.
80/2 = 40 Km/h.
(80*100)/4 = 2000 vehicles per hour.
Speed = Free flow speed / 2.
80/2 = 40 Km/h.
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