The vehicle speed 20 m / s to see that on rough roads and high speed of the vehicle. The frequency of the vehicle itself will be overshadowed by the frequency of the bridge, we want to find.
At the speed of 20 m/s vehicles can see that when the rough road and the vehicle's speed is high. The frequency of the vehicle itself will continue to obscure the frequency of bridge that we need.
The speed of the vehicle 20 m/s will be seen that when rough road and the speed of your vehicle, a high-frequency of the vehicle itself will be overshadowed by the frequency of the bridge, we need to find out