| Item | Obligations |
|---|---|
| Engineering Services | $1.5B |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $1B |
| Telecommunications Resellers | $938M |
| Highway, Street, and Bridge Construction | $713M |
| Deep Sea Freight Transportation | $592M |
| Telephone Apparatus Manufacturing | $567M |
| Computer Systems Design Services | $550M |
| All Other Professional, Scientific, and Technical Services | $452M |
| Other Computer Related Services | $317M |
| Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services | $277M |
Engineering Services was Transportation's largest contract category, with $1.5B obligated (14.9% of contract spending).