Lax-Hopf approach for solving Generic Second Order Models (GSOM) in traffic flow modeling

These codes are based on the following paper:

Guillaume Costeseque, Jean-Patrick Lebacque, A variational formulation for higher order macroscopic traffic flow models: Numerical investigation, Transportation Research Part B: Methodological, Volume 70, 2014, Pages 112-133, ISSN 0191-2615,

https://doi.org/10.1016/j.trb.2014.08.012.

(https://www.sciencedirect.com/science/article/pii/S0191261514001477)