The speed-density relationship in a mid-block section of a highway follows the Greenshield's model. If the free flow speed is $v_{f}$ and the jam density is $k_{j},$ the maximum flow observed on this section is
(A) $v_{f} k_{j}$
(B) $\frac{v_{f} k_{j}}{2}$
(C) $\frac{v_{f} k_{j}}{4}$
(D) $\frac{v_{f} k_{j}}{8}$
The speed-density relationship in a mid-block section of a highway follows the Greenshield's model. If the free flow speed is $v_{f}$ and the jam density is $k_{j},$ the maximum flow observed on this section is
(A) $v_{f} k_{j}$
(B) $\frac{v_{f} k_{j}}{2}$
(C) $\frac{v_{f} k_{j}}{4}$
(D) $\frac{v_{f} k_{j}}{8}$