Transportation Demand Management (TDM) is the practice of changing how people move around the city by encouraging the use of more sustainable types of transportation as part of daily commutes. Santa Monica works with its employers and developers to increase the number of people using sustainable modes of transportation as a means to enhance wellbeing and satisfy state and local environmental requirements. The TDM Ordinance, S.M.M.C. Ch. 9.53, establishes a system for your organization to coordinate transportation programs at your worksite or development. While some ordinance elements are optional, most are requirements triggered by specific aspects of your business or project.