Will Automated Vehicles Negatively Impact Traffic Flow?

Table 4

Overall findings from the experiment.

Aspect	Found effect of low-level vehicle automation (ACC with reduced lane-changing)	Main possible cause
Gap time	Small negative; Capacity decrease ranging from 1-2% to 2–7%; (highly dependent on time-headway settings applied in the future)	Higher mean gap for ACC vehicles, especially relevant for low penetration rates
	Very small negative; Increase of capacity drop, <2%	Lower discharge flow at high penetration rate due to less aggressive acceleration
Interaction with trucks	No substantial effect
Bottleneck severity	No substantial effect