| Attribute processing profile | Sample no. of observations = 3,568 |
|---|---|
| All attributes attended to (v1) | 1,856 |
| Attributes not attended to: | |
| Running cost (v2) | 640 |
| Running and toll cost (v3) | 192 |
| Toll cost (v4) | 96 |
| Slowed down time (v5) | 192 |
| Free flow and slowed down time (v6) | 304 |
| Free flow time (v7) | 112 |
| Slowed down time and running cost (v8) | 64 |
| Free flow and slowed down time and toll cost (v9) | 48 |