Only a few vehicles were seen hours before and after the fight at Mandalay Bay in Las Vegas, where the former emerged as the winner via a unanimous decision.
The fight went the full length with neither fighter tasting a knockdown.
Rep. Darlene Custodio, who defeated Mr. Pacquiao in congressional elections on May 14, hailed the Filipino boxing icon for his victory.
Ms. Custodio, who watched the fight live at a giant television screen at the Lagao gymnasium here with thousands of other people, said Mr. Pacquiao showed everybody he has the "heart of the champion."
Many here, including Ms. Custodio, predicted that Mr. Pacquiao would floor his opponent within six rounds.
"Nevertheless, congratulations Manny. Thank you once again for giving honor to GenSan and the Philippines," she told reporters shortly after the fight.
At the mansion of Mr. Pacquiao, his mother Dionisia and several other women prayed at an altar on the second floor for his victory before the fight.
Ms. Pacquiao earlier expressed confidence his son would emerge the winner.