| Other | OLI_OTHER | 2147483647 |
| Travel is by Automobile | OLI_TRAVTRAN_AUTO | 2 |
| Travel is by Boat | OLI_TRAVTRAN_BOAT | 3 |
| Travel is by Common Carrier Air | OLI_TRAVTRAN_AIRPLANE | 1 |
| Travel is by Ship | OLI_TRAVTRAN_SHIP | 4 |
| Travel is by Train (Locomotive) | OLI_TRAVTRAN_TRAIN | 5 |
| Unknown | OLI_UNKNOWN | 0 |
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