GATE CE 2022 Set 2 — Question 63
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Transportation Engineering → Traffic Studies & Flow → Fundamental Flow Relationships
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Question
Assuming that traffic on a highway obeys the Greenshields model, the speed of a shockwave between two traffic streams (P) and (Q) as shown in the schematic is _______ kmph. (in integer)

Correct answer
15 to 15
Solution
The speed of a shockwave () is given by the change in flow divided by the change in density:
1.Calculate density for stream (P):
2.Calculate density for stream (Q):
3.Calculate shockwave speed:
The speed of the shockwave is 15 kmph.Continue learning with Success Tracker
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