| Hour | Friday, 9/11-Saturday, 9/12 (PL and DSL deployed) | Saturday, 9/12-Sunday, 9/13 (base condition) | Median speed difference (mph) [a-b] | ||||
| Median speed (mph) [a] | Number of trajectories | Sample size | Median speed (mph) [b] | Number of trajectories | Sample size | ||
| 11:00PM-12:00AM | 50.1 | 22 | 1266 | 57.3 | 25 | 1275 | −7.2 |
| 12:00AM-1:00AM | 46.5 | 21 | 1500 | 57.3 | 14 | 689 | −10.8 |
| 1:00AM-2:00AM | 47.2 | 8 | 398 | 57.3 | 10 | 449 | −10.1 |
| 2:00AM-3:00AM | 48.0 | 10 | 669 | 60.8 | 8 | 413 | −12.8 |
| 3:00AM-4:00AM | 52.3 | 5 | 314 | 51.9 | 3 | 178 | 0.4 |
| 4:00AM-5:00AM | 54.4 | 7 | 407 | 50.1 | 5 | 278 | 4.3 |
| 5:00AM-6:00AM | 53.0 | 14 | 824 | 56.5 | 13 | 533 | −3.5 |
| 6:00AM-7:00AM | 53.0 | 18 | 1065 | 56.5 | 13 | 629 | −3.5 |
| Average | 50.6 | 13.1 | 805.4 | 56.0 | 11.4 | 555.5 | −5.4 |