Mar 01, 2018 · The demonstration project of our piezoelectric power supply system is located at K90 + 700 of Ma-Zhao Highway near Zhaotong City, Yunnan Province, where the total length of trial pavement section is about 50 m. 20 fabricated PEHs are installed in real pavement, including 10 rectangular and 10 circular ones. Ma-Zhao Highway is a two-direction