GATE CE 2020 Set 1 — Question 55

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NAT+2 / -0HardPeak Hour FactorTraffic Studies & FlowTransportation EngineeringHighway CapacityIntersections & Signals

Transportation Engineering → Intersections & Signals → Highway Capacity

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Traffic volume count has been collected on a 2-lane road section which needs upgradation due to severe traffic flow condition. Maximum service flow rate per lane is observed as 1280 veh/h1280\text{ veh/h} at level of service 'C'. The Peak Hour Factor is reported as 0.781250.78125. Historical traffic volume count provides Annual Average Daily Traffic as 12270 veh/day12270\text{ veh/day}. Directional split of the traffic flow is observed to be 60:4060:40. Assuming that traffic stream consists of 'All Cars' and all drivers are 'Regular Commuters', the number of extra lane(s) (round off to the next higher integer) to be provided, is ________.

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