Research Article
Vibration Effect Produced by Raised Pavement Markers on the Exit Ramp of an Expressway
Table 4
The classification of each variable.
| | Variable name | Variable value |
| | Type of vehicle | Car | 0 | | Semi-trailer truck | 1 |
| | Spacing | 3 m | 0 | | 4 m | 1 | | 5 m | 2 | | 6 m | 3 | | 7 m | 4 | | 11 m | 5 | | 15 m | 6 |
| | Speed | 40 km/h | 0 | | 50 km/h | 1 | | 55 km/h | 2 | | 60 km/h | 3 | | 65 km/h | 4 | | 70 km/h | 5 |
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