The third set of users is called a “visitor”. These users enter
the simulation area at a random intersection and visit an office
building (probability of 2.5 % per building), a shop (12.5 % per
shop), a restaurant (12.5 % per restaurant), a block of flats (2 %
per block), or they just pass through the area without any stop
(25 %). After visiting certain POI, the visitor leaves the area
again at one of the randomly selected intersection (see Fig. 4c).