Dynamic Congested Traffic States of Density Difference Lattice Hydrodynamic Model with On-Ramp

Figure 2

Schematic illustration of speed and flow as a function of the density for 𝜌_𝑐=𝜌₀=0.25,  𝑣_max=2 m/s. (a) The speed-density curve. (b) The flow-density curve.

(a)

(b)