Pedro M Cruz has been experimenting with different kinds of visualizations of Lisbon’s roads, based around mutating and morphing the network according to traffic flows.
In this video he visualizes the road network as blood vessels in a living organism with circulatory problems. In his own words:
…a greater number of vehicles on a vessel tend to make it thicker, higher speeds tend to contract its length (an vice-versa). The latter behavior was chosen in order to transmit a global impression of the perceived distances within the city. This behavior shrinks the city when the traffic velocities are higher, and distends it in the rush hours when the city faces congestion problems.