Image is a table by SmartAsset titled "Cities Where Residents Have the Worst Commutes".
1. This is in minutes.
2. This is the percentage of workers with commutes longer than an hour.
3. This is average transportation costs (e.g. gas, vehicle expenses, public transportation, etc.) divided by the median income for an individual. This metric is at the metro area level.

Note: Our analysis includes two metrics that are not shown on this table. They are percentage of workers who commute and five-year change in the percentage of workers with a severe commute.