Operation Fuavai made 177 arrests between 23 December and 6 January, nearly 100 less than the previous year at the same time.
And the road toll for the entire year was four compared to 22 in 2018.
Acting Deputy Commissioner 'Atunaisa Taumoepeau said from the middle of last year, patrols had been boosted, particularly around the capital of Nuku'alofa.
"Our tactical response unit and all supporting units assist our general business area on the weekend and since then we see that the people are getting more used to that.
