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The free mean speed is 60 km/hr on a given road. The average space headway at jam density on this road is 8 m. For a linear speed-density relationship, the maximum flow (in veh/hr/lane) expected on the road is
- 1875
- 938
- 2075
- 1038
Correct answer: 1875
Solution
Jam density kj = 1000/8 = 125 veh/km. For the linear Greenshields model the maximum flow is q_max = vf*kj/4 = 60*125/4 = 1875 veh/hr/lane. The stored value 938 (which is half of that) is wrong; the answer is index 0, 1875.
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