Research Article
Vibration Effect Produced by Raised Pavement Markers on the Exit Ramp of an Expressway
Table 5
Interaction test. The dependent variable: the combined total weighted acceleration RMS.
| | Source | Type III Sum of Squares | df | Mean Square | F | Sig. (P) |
| | Corrected model | 2.633 | 67 | 0.039 | 3.409 | 0.062 | | Intercept | 56.520 | 1 | 56.520 | 4903.704 | 0.000 | | Type of vehicle | 0.415 | 1 | 0.415 | 36.043 | 0.001 | | Speed | 0.278 | 5 | 0.056 | 4.819 | 0.041 | | Spacing | 1.227 | 6 | 0.204 | 17.740 | 0.001 | | Type of vehicleSpeed | 0.031 | 5 | 0.006 | 0.540 | 0.742 | | Type of vehicleSpacing | 0.205 | 6 | 0.034 | 2.958 | 0.106 | | SpeedSpacing | 0.199 | 22 | 0.009 | 0.785 | 0.691 | | Type of vehicleSpeedSpacing | 0.027 | 22 | 0.001 | 0.105 | 1.000 | | Error | 0.069 | 6 | 0.012 | -- | -- | | Total | 71.209 | 74 | -- | -- | -- | | Corrected total | 2.702 | 73 | -- | -- | -- |
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a. R2=0.974 (Corrected R2=0.689).
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