TABLE 3.
Mean (SD) Characteristics of Ambient and Trip Conditions During Monitored Bus Trips
| All Trips | Trips with Paired Lead Vehicle | |||||
|---|---|---|---|---|---|---|
| Overall | Seattle | Tahoma | Overall | Seattle | Tahoma | |
| Ambient Temperature (°F) | 53 (11) | 53 (10) | 52 (11) | 51 (11) | 51 (11) | 52 (12) |
| Ambient Relative Humidity (%) | 65 (18) | 66 (16) | 64 (20) | 63 (19) | 63 (18) | 62 (21) |
| Ambient Wind Speed (mph) | 6.6 (3.4) | 5.3 (2.8) | 8.1 (3.4) | 6.6 (3.5) | 5.1 (3.2) | 8.4 (3.0) |
| Trip Duration (minutes) | 22 (12) | 28 (12) | 16 (7) | 24 (12) | 30 (13) | 18 (8) |
| Heating Season (Oct - Feb) | 33% | 35% | 31% | 39% | 40% | 38% |
| Bus Stops | 4 (3) | 5 (3) | 4 (4) | 5 (4) | 5 (3) | 4 (4) |
| Window Usage | ||||||
| Any Windows Open | 48% | 60% | 36% | 45% | 59% | 32% |
| Most Windows Open | 27% | 35% | 18% | 31% | 41% | 21% |
| Total Distance (miles) | 4.8 (3.0) | 6.2 (2.7) | 3.5 (2.7) | 5.0 (2.7) | 5.7 (2.5) | 4.3 (2.9) |
| Length of Route by Type (%) | ||||||
| Interstate | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| State Highway | 1 (6) | 3 (8) | 0 (0) | 1 (6) | 2 (8) | 0 (0) |
| Major Arterial | 48 (26) | 63 (16) | 30 (24) | 49 (28) | 67 (13) | 31 (28) |
| Local Roads | 51 (27) | 34 (15) | 70 (24) | 50 (28) | 31 (11) | 69 (28) |
| Last maintenance (days) | 49(60) | 90 (70) | 17 (15) | 54 (65) | 97 (71) | 14 (152) |