| Cumulative Speed Reduction of at least x mph 30 seconds after alert | % of visits showing corresponding cumulative speed reductions 30 seconds after alert | |
| Congestion Alerts | Dangerous Slowdown Alerts | |
| 0.01 | 56.0 | 62.7 |
| 0.50 | 48.0 | 53.3 |
| 1.00 | 40.8 | 47.3 |
| 2.00 | 32.9 | 37.7 |
| 3.00 | 27.3 | 31.8 |
| 4.00 | 22.7 | 27.0 |
| 5.00 | 19.1 | 21.9 |