| often | 5 | degree |
| by increasing road traffic levels | 5 | cause |
| because of classism | 4 | cause |
| problem → be → caused | 62 |
| problem → be → cause | 6 |
| problem → have → cause | 4 |
| problem → be → the cause | 4 |
| negative | neutral | positive |
| 0.644 | 0.301 | 0.055 |
| Raw frequency | 76 |
| Normalized frequency | 0.517 |
| Modifier score | 0.700 |
| Perplexity | 321.659 |