Each year, the rhythm of school holidays draws hundreds of thousands of people across the narrow strait between Singapore and Malaysia, turning the act of crossing a border into an exercise in collective patience. This September, as families plan their journeys between the 4th and 14th, Singapore's Immigration and Checkpoints Authority has stepped forward with a quiet but firm reminder: the infrastructure of movement has its limits, and those limits are most visible when everyone moves at once. The authority's advisory is less a warning than an invitation to travel wisely — to read the flow of