Data issued by Canberra CBD showed an estimated 1200 men relieved themselves at temporary public urinals over the four nights of the trial's first weekend, with nearly 450 people on Saturday night alone.

The organisation came to its estimation based on the average amount each man would be expected to leave.

Canberra CBD executive officer Jane Easthope said urinals were showing good results.

"The first weekend of the trial has already shown that the urinals have served their purpose and we are pleased they have already made an impact," she said.

"We are determined to make the city's laneways cleaner and more usable to the general public. This trial is just one example of how we are implementing change."

The project was launched after complaints from traders about men using public places including laneways and shop fronts to go to the toilet.

The trail continues over the Easter long-weekend, and public urinals will again be placed in Verity Lane, at the bus interchange on the corner of Alinga Street and Verity Lane, and on City Walk near the corner of Saraton Lane.

The urinals will be in place from 7pm to 7am, Thursday night to Monday morning this weekend.

On the spot fines of $200 can be issued to anyone caught unirating in public in the ACT, with more than 270 fines issued in the past 12 months.