Daily transportation of vehicles is one of the most important challenges in municipal solid waste management systems in developing countries related to environmental aspects in different areas, financial issues, and social factors. The location of transfer stations as intermediate nodes in municipal solid waste management network affects optimal collection frequency. Here a sustainable multi-period and multi-trip mixed-integer linear programming model was developed to redesign the intermediate transfer stations and find optimal routes for vehicles and the best collection frequency for each municipal solid waste generation point. Regarding the social aspect of sustainability, an extended social life cycle assessment methodology is developed for impact assessment of redesign and routing operations. The model is applied to a real-world case study with no cooperative perspective, which could result in total cost reduction by a 66% that occurred by a 86% reduction in weekly traveled distance and a 12% decrease in routing social score.