| Mode | Year | AM Peak Choice | non-AM Peak Choice | Total | ||
| Trips | % | Trips | % | |||
| Drive
Alone |
1990 | 963,018 | 55.2% | 781,961 | 44.8% | 1,744,979 |
| 2000 | 1,037,018 | 54.8% | 856,484 | 45.2% | 1,893,502 | |
| 2010 | 1,179,485 | 53.2% | 1,038,745 | 46.8% | 2,218,230 | |
| 2020 | 1,263,530 | 52.5% | 1,142,330 | 47.5% | 2,405,860 | |
| Shared
Ride 2 |
1990 | 80,376 | 59.8% | 53,956 | 40.2% | 134,332 |
| 2000 | 90,600 | 59.2% | 62,496 | 40.8% | 153,096 | |
| 2010 | 104,578 | 58.0% | 75,761 | 42.0% | 180,339 | |
| 2020 | 116,521 | 57.6% | 85,747 | 42.4% | 202,268 | |
| Shared
Ride 3+ |
1990 | 17,078 | 70.6% | 7,097 | 29.4% | 24,175 |
| 2000 | 19,200 | 68.9% | 8,677 | 31.1% | 27,877 | |
| 2010 | 22,770 | 67.0% | 11,206 | 33.0% | 33,976 | |
| 2020 | 25,291 | 66.3% | 12,830 | 33.7% | 38,121 | |
| Total | 1990 | 1,060,472 | 55.7% | 843,014 | 44.3% | 1,903,486 |
| 2000 | 1,146,818 | 55.3% | 927,657 | 44.7% | 2,074,475 | |
| 2010 | 1,306,833 | 53.7% | 1,125,712 | 46.3% | 2,432,545 | |
| 2020 | 1,405,342 | 53.1% | 1,240,907 | 46.9% | 2,646,249 | |