The Executive Committee of the Four Days of the Yser pays a lot of attention to the aspect 'security' of the walkers during the preparation as well as during this march of the Belgian Defence.

The routes are scouted, studied and discussed in detail with police officers from the local police forces of the participating cities and municipalities and with members from detachment Echo of the Military Police Group, stationed in 'Kamp van Lombardsijde' barracks in Nieuwpoort.

During the Four Days, all these people work together to assure the security along the routes, on the junctions and in other dangerous traffic situations.