What is the fundamental relationship among speed (u), density (k), and flow (q)?

The representation of the traffic flow is determined by three main characteristics of this: The flow, the density and the speed. The relationship between the three helps to improve the design of the roads as well as all kinds of facilities operations.

The mathematical relationship that groups them is given by the function:

Where,

= Speed

k = Density

q = Flow

Through it it is possible to obtain properties of this by which,

less than one you can't create energy

current flows in a wire