| Number | Symbol | Symbol Description |
| 1 | Y | Traffic congestion index |
| 2 |
| Average driving speed |
| 3 |
| Average driving time |
| 4 |
| Average loss time |
| 5 | TD | Traffic density |
| 6 | TV | Traffic volume |
| 7 |
| Whether early peak (Yes is 1; No is 0) |
| 8 |
| Whether late peak (Yes is 1; No is 0) |
| 9 |
| Whether weekday(Yes is 1; No is 0) |