The Pennsylvania Department of Transportation, also known as PennDOT, offers a range of commuting options. The department is a part of Commonwealth of Pennsylvania, which provides a variety of administrative services. The department offers driver and vehicle services. The Pennsylvania Department of Transportation operates aviation, design, financial management, and construction and materials bureaus. The department also maintains public transportation, municipal services, and infrastructure and operations bureaus. In addition, it has human resources, office Services, highway safety and traffic engineering, and rail freight, ports and waterways bureaus. The Pennsylvania Department of Transportation s aviation bureau works for the development and promotion of aviation systems.