The signal head vibration absorber (SHVA) is an effective vibration mitigation device proposed to reduce the in-plane wind-induced vibration and corresponding fatigue of traffic signal support structures. The SHVA was successfully tested in the Advanced Hazards Mitigation Laboratory at the University of Connecticut subjected to both free and force vibration testing utilizing pluck tests and a linear shaker. A new realization of the SHVA has been developed that provides for no modifications of standard signal heads or mounting hardware and is readily installable in the field for both retrofit and new applications. This paper provides research verification of the performance of the SHVA to reduce wind-induced vibration in traffic signal support structures. Successful field testing of a traffic signal support structure with a 60 foot (18.29 m) long mast arm is conducted at the Texas Tech University’s National Wind Institute (NWI) Wind Engineering Research Field Laboratory. The field test results, consistent with prior laboratory testing, show that the SHVA is able to reduce in-plane motion of the mast arm tip by 90%.
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