The goal of this project is to investigate the vibration and noise characteristic and its control measures for transportation systems. The system to be investigated for the third year is the freeway systems. The topics to be investigated are 1.According to the type of pavement velocity, etc. select points for noise and vibration measurement. 2.Establish data base for noise and vibration measurements. 3.According to the results from noise and vibration measurement, determine the standard procedure for noise measurement. 4.From the measurement results, analysize the characteristics of noise and vibration for freeway systems. 5.According the characteristics of measured data, propose the regulations and control measures for noise and vibration for freeway systems. 6.Invite government agencies to discuss the proposed regulations on noise and vibration for freeway systems. After carrying out six research topics mentioned above, following work have been accomplished. 1.Complete 30 noise and 38 vibration in-situ measurements at different location on freeway systems. 2.Establish standard measurement procedure for noise and vibration for freeway systems. 3.Propose regulations and control measures for noise and vibration from freeway systems. 4.Establish data base of noise and vibration for freeway system with different traffic flow, different lane number, etc. 5.Propose improvement measures for noise and vibration for freeway systems. 6.Consultation with relevant government agency of freeway systems.

Vibration, Noise, Transportation Systems, Data Base, Abatement Measures, Control Policy