  The Braess paradox can be observed in road networks used by selfish users. It
describes the counterintuitive situation in which adding a new, per se faster,
origin-destination connection to a road network results in increased travel
times for all network users. We study the network as originally proposed by
Braess but introduce microscopic particle dynamics based on the totally
asymmetric exclusion processes. In contrast to our previous work
[10.1103/PhysRevE.94.062312], where routes were chosen randomly according to
turning rates, here we study the case of drivers with fixed route choices. We
find that travel time reduction due to the new road only happens at really low
densities and Braess' paradox dominates the largest part of the phase diagram.
Furthermore, the domain wall phase observed in [10.1103/PhysRevE.94.062312]
vanishes. In the present model gridlock states are observed in a large part of
phase space. We conclude that the construcion of a new road can often be very
critical and should be considered carefully.
