What are the Dept Of Transportation, Washington DC Zip Codes for 2020, 2019Primary Zip Codes for Dept Of TransportationZip CodePrimary CitySecondary City20590WashingtonDept Of Transportation20591WashingtonDept Of TransportationCities sharing Zip Codes with Dept Of TransportationZip CodePrimary CitySecondary CityMore Information20590WashingtonDept Of Transportation20591WashingtonDept Of TransportationAdvertisements