An Improved Car-Following Speed Model considering Speed of the Lead Vehicle, Vehicle Spacing, and Driver’s Sensitivity to Them

Figure 2

An example of time-varying correlations of speed of the lag vehicle with car-following spacing and speed of the lead vehicle. (a) Line 1, (b) line 2, (c) line 3, and (d) line 4.

(a)

(b)

(c)

(d)