Secondly, fluid traffic requires roads and vehicles that permit
sufficient speed, within the limits of safety and require the human
spirit of collaboration and courtesy as well as solid knowledge of
traffic regulations, the principles of signs that direct traffic. These
two aims, instead of complementing each other, are rather incompatible
and therefore any traffic rule should seek to strike a balance
between the two so that any manoeuvre in traffic can be safe as
well as fluid.
An essential aspect consists of improving the flow of vehicles
through the cities [23,29,31]. Some authors have analyzed the flow