Distribution of subjective responses to traffic noise using the questionnaire categories
| Item (noise effect) | Category | ||||
|---|---|---|---|---|---|
| 1 (never) | 2 (seldom) | 3 (sometimes) | 4 (often) | 5 (always) | |
| Annoyance | 51.9% | 24.7% | 19.5% | 2.7% | 1.2% |
| Disturbed concentration | 46.7% | 29.1% | 19.8% | 2.9% | 1.5% |
| Disturbed conversation, radio, TV | 58.2% | 23.2% | 14.8% | 2.8% | 1.0% |
| Disturbed relaxation | 59.1% | 24.0% | 13.6% | 2.3% | 1.0% |
| Feeling nervous or tense | 68.4% | 18.8% | 10.2% | 1.9% | 0.7% |
| Difficulty in falling asleep | 66.9% | 18.3% | 11.6% | 2.3% | 0.9% |
| Waking up at night | 51.5% | 24.8% | 19.7% | 2.9% | 1.1% |