| Code Value |
Definition |
| A1 | Commercial Flights - All |
| A2 | Commercial Flights - ACE |
| A3 | Commercial Flights - ACE - Nbr of PAX |
| A4 | Commercial Flights - APIS |
| A5 | Commercial Flights - APIS - Nbr of PAX |
| A6 | Charter Flights |
| A7 | Private Flights |
| A8 | Military Flights |
| A9 | In-Transit Lounge Passengers |
| Commercial Cargo Ship | Commercial Cargo Ship |
| Commercial Cargo Vehicle | Commercial Cargo Vehicle |
| L1 | Non-Commercial Vehicles |
| L2 | Commercial Vehicles |
| L3 | Buses |
| L4 | Trains |
| L5 | Dedicated Commuter Lane(DCL) |
| L6 | Pedestrians |
| Medical Board of Maryland | Medical Board of Maryland |
| Private Aircraft | Private Aircraft |
| S1 | Commercial Passenger Vessels |
| S2 | Commercial Cargo Vessels |
| S3 | Private Vessels |
| Train | Train |
| US Department of State | US Department of State |
| Virginia State Department of Transportation | Virginia State Department of Transportation |