Table 1.
Travel-related variable description and data sources.
| Variables | Data description | Data source |
|---|---|---|
| COVID | Daily confirmed cases of COVID-19 | The New York Times (2020) |
| CAS | Proposed Community Activity Score (CAS) | HDOT (2020) |
| SDI | Social Distance Index: ranging from 0 (no social distancing is observed) to 100 (everyone staying at home and no visitors are entering the county) | Maryland Transportation Institute (2020) |
| Travel frequency and distance | ||
| Home | Percentage of people traveling less than 1 mile away from their residence place compared to the pandemic baseline. | USDOT (2020) |
| Trip | The number of trips made per day compared to the pandemic baseline. A trip is defined as movements that include a stay of longer than 10 min at an anonymized location away from home. | USDOT (2020) |
| Drive | Daily Volume of driving directions requests compared to the pandemic baseline. | Apple (2020) |
| Transit | Daily Volume of transit directions requests compared to the pandemic baseline. | Apple (2020) |
| Walk | Daily Volume of walking directions requests compared to the pandemic baseline. | Apple (2020) |
| Distance | The maximum travel distance to a point from the initial point of the day (i.e., the max-distance mobility) compared to the pandemic baseline. | Descartes Labs (2020) |
| Mobility trend | ||
| Retail | The number of visits to restaurants, cafes, shopping centers, theme parks, museums, libraries, and movie theaters compared to the pandemic baseline. | Google (2020) |
| Grocery | The number of visits to grocery markets, food warehouses, farmers' markets, specialty food shops, drug stores, and pharmacies compared to the pandemic baseline. | Google (2020) |
| Park | The number of visits to national parks, public beaches, marinas, dog parks, plazas, and public gardens compared to the pandemic baseline. | Google (2020) |
| Stations | The number of visits to national parks, public beaches, marinas, dog parks, plazas, and public gardens compared to the pandemic baseline. | Google (2020) |
| Work | The number of visits to places of work compared to the pandemic baseline. | Google (2020) |
| Residences | The number of visits to places of residence compared to the pandemic baseline. | Google (2020) |
| Out-of-county visitors | ||
| Airport | The number of people through Hawaii airport (hundreds). | Hawaii Tourism Authority (2020) |