City Council also wants to create more affordable housing for the poorest residents.

Portland may subpoena Uber over its use of a software tool to evade city regulators before a pilot program allowing it to operate in town was approved by the City Council.

The issue came to light through a New York Times article about "Greyball," a technology which Uber utilized to skirt local regulators around the world. After it was published, the City Council authorized the Portland Bureau of Transportation to conduct an audit of Uber and the other so-called Transportation Network Companies (TNC).

In an April 27 memo, Commissioner Dan Saltzman says Uber has since refused to provide information about the technology to the city. No other TNC used such technology to evade regulation, Saltzman said.

Council OKs affordable housing but wants to do more

On Wednesday, the City Council granted 10-year property tax exemptions to seven new apartment buildings where developers agreed to make 20 percent of the units affordable.

Commissioner Nick Fish said they will not do much to ease the affordble housing crisis because in five of the buildings, the units must only be affordable to those earning 80 percent or less of the median family income. In the other two, the limit is 60 percent of less.

The program the developers qualified for was passed well before the current crisis, however. Since then the council has focused much of its efforts on creating housing that those earning 30 percent or less of the median income can afford.