What human factors play part in traffic congestion? Traffic congestion is a daily phenomenon that costs people a lot of time, is bad for the environment and may even cost some money. There are many obvious causes for traffic congestion, such as the amount of cars, size of the road, situational factors on the road such as accidents etc.(e.g. this blog or (Wiki). 

It seems that increasing the capacity of the road capacity is not a solution to the problem, since it only appears to attract more users (Arnott and Small, 1994). Therefore, I was thinking whether there were any other factors that could influence congestion. It is obvious that each car has a human drive (well almost each car). Perhaps, their behavior could likely also play part in causing congestion. 

Is there any scientific evidence that behavioral factors (e.g. excessive de- and acceleration or lane switching) may promote/prevent traffic congestion? 

References

Arnott, R., &amp; Small, K. (1994). The economics of traffic congestion. American scientist, 446-455.
Kesting, Treiber and Helbing (2000) created an Intelligent Driving Model (IDM) based on actual data on the German highway. The model is a single lane model, assuming that the trailing car tries to fixate the distance of the leading car by accelerating and decelerating only. 



From Kesting, Treiber and Helbing (2008):


  The IDM acceleration is a continuous function incorporating different driving modes for all velocities in freeway traffic as well as city traffic. Besides the distance to the leading vehicle s and the actual speed v, the IDM also takes into account velocity differences ∆v, which play an essential stabilizing role in real traffic, especially when approaching traffic jams and avoiding rear-end collisions (see Fig. 3). The IDM acceleration function is given by:




work in progress. To be continued