  Real-time traffic information can be utilized to enhance the efficiency of
transportation networks by dynamically updating routing plans to mitigate
traffic jams. However, an interesting question is whether the network
coordinator should broadcast real-time traffic information to all network users
or communicate it selectively to some of them. Which option enhances the
network efficiency more? In this work, we demonstrate using simulation
experiments that sharing real-time traffic information with all network users
is sub-optimal, and it is actually better to share the information with a
majority subset of the total population in order to improve the overall network
performance. This result is valid under the assumption that each network user
decides its route to destination locally.
