Local services in Dallas
There are 337 public schools, 89 private schools, 38 colleges, and 32 libraries in Dallas.Dallas-Fort Worth is also home to six Nobel Laureates. The Dallas area has the highest concentration of colleges and universities in Texas. In addition to those in the city, the surrounding cities also has several universities, colleges, trade schools, and other educational institutions. Dallas has many hospitals and several medical research facilities within its city limits. One major research center is the Dallas Medical District with the UT Southwestern Medical Center in the Stemmons Corridor, along with the affiliated UT Southwestern Medical School. The healthcare complex includes within its bounds Parkland Memorial Hospital, Children's Medical Center, William P. Clements University Hospital (formerly St. Paul University Hospital), and the Zale Lipshy University Hospital. Like many other major cities in the United States, the automobile is the primary mode of local transportation, though efforts have been made to increase the availability of alternative modes of transportation, including the construction of light rail lines, biking and walking paths, wide sidewalks, a trolley system, and buses. Walk Score ranked Dallas the twenty-third most walkable of fifty largest cities in the United States.