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Cargo bikes, elongated bicycles fitted with a front or rear box for hauling goods or children, have moved from niche curiosity to mainstream delivery tool in several dense European cities. Logistics companies find them useful for the last mile of urban delivery, where narrow streets and parking restrictions slow vans but barely affect a bike. Studies commissioned by city transport departments suggest cargo bikes can complete short urban deliveries faster than vans during peak congestion, since they bypass traffic queues and rarely need to search for parking. Adoption has been slower in cities with hillier terrain or harsher winters, where electric assist motors help but battery range and cold-weather reliability remain persistent concerns for fleet operators planning year-round service.