Investigation of traffic induced vibrations and luminaire behavior

Abstract: Since the mid-1980s there has been numerous research on vibration and fatigue of traffic signal and sign structures. Recently, it has been recognized that both wind and traffic can cause vibration problems in roadway lighting and that the more severe problems usually exist on bridges where both wind and traffic provide exciting forces. Lighting manufacturers are primarily concerned with damaging fatigue that can cause structural failure of luminaires, but departments of transportation also are interested in excessive lamp failures. Usually excessive lamp failures are found in bridge lighting installations for poles located away from bridge supports. This paper summarizes research efforts made in the recent past to investigate the relationship between traffic induced vibrations and luminaire failures on a cable-stayed bridge.

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