Established in 2003, SouthWest Traffic Engineering LLC is one of the leading providers of traffic engineering planning/study and design services in the United States. Located in Phoenix, Ariz., the company offers a range of services, such as pedestrian circulation evaluation, transportation modeling, access management development, design concept reports, transit planning and alternative transportation modes. It has worked on a variety of projects for private clients and government agencies, among others. The company is also working with municipalities in Arizona.