Today, April 18, Islamabad, the capital of Pakistan, has officially enforced a ban on heavy vehicles entering the city. According to Odaily, local long-distance bus stations have tightened controls, and metro and bus services have reduced their operating hours. The core logic behind this transportation upgrade in Islamabad is to enhance an atmosphere of 'mutual trust' by ensuring absolute physical security, compensating for the weak foundation of diplomatic trust. This move aims to demonstrate to Washington and Tehran that Islamabad is not only a geographical transit point but also an island of absolute security in terms of information and safety. Currently, the Pakistani government has not announced a timetable for the new round of U.S.-Iran negotiations.