Pseudofluid dynamics

Wei Hong commented on CY’s link:

SmartMotorist.com The Physics Behind Traffic Jams c2008 “Boredom lead me to fantasize about the traffic being like a flowing liquid, with cars acting as giant water molecules.”

While traffic bears superficial resemblance to fluid currents, attempts to model traffic using fluid dynamics will be mathematically unfruitful as traffic has characteristics opposite to that of fluids. For example, consider that a given current of fluid across a pipe of varying radius will have the highest flow speed across the narrowest segments. For traffic, the reverse applies.