navigating history: road signs governing passage at the historic rheintor in zons, setting vehicle limit at 2.8m during zons

old medieval stone wall fortification architecture europe germany 28m vehicle limit governing passage zollfeste zons rheintor german signs typical street commemorative celebration event cultural enrichment festivals legacy historic historical identity landmark landmarks preservation rhein rheinland culture road safety signage stadtfest navigation traffic control limitations management regulations transportation guidelines urban aesthetics celebrations height restrictions specifications history navigating history: setting 2 8m stadtfest's 650th anniversary