Transport and Mobility
1/ "Tunnels, oorzaak van files", BDW 1509, 11 februari 2016, blz. 8. [Read online] 2/ "Six Freeway Removals That Changed Their Cities Forever", Alissa Walker, Blog Gizmodo, 25/05/2016. [Read online] 3/ "Braess' paradox" - article about "a proposed explanation for a seeming improvement to a road network being able to impede traffic through it" -