GATE CE 2026 Set 1 — Question 60
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Transportation Engineering → Traffic Studies & Flow → Traffic Volume Studies
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Question
Traffic is moving on a -lane dual carriageway road. Traffic volume per direction during peak hour ( am to am) is veh/h. It is assumed that the traffic is distributed uniformly across the lanes in each direction. Just at am, a truck goes out of order on the middle lane of one side, thus disrupting the traffic on that lane in one direction. The lane capacity under normal conditions is veh/h/ln and under queue formation it is veh/h/ln. The traffic resumes at am on removing the truck from the middle lane. Hourly traffic volume after am reduces to veh/h/dir. The number of vehicles in the queue at am is ______ (in integer).
Correct answer
2200 to 2200
Solution
1.Identify Arrival Rates:
- From to am: veh/h.
- After am: veh/h.
- From to am (one lane blocked, lanes open): veh/h.
- From am onwards (all lanes open, but queue exists): veh/h.
- vehicles.
- From to am, the arrival rate is still veh/h and the discharge rate is veh/h.
- vehicles.
- From to am, the arrival rate is veh/h and the discharge rate is veh/h.
- vehicles.
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