HONOLULU -- Two more candidates on Thursday entered the race for Honolulu mayor.

Acting Mayor Kirk Caldwell made it official as he filed his nomination papers to run for Honolulu mayor. Caldwell was joined by his wife Donna Tanoue, daughter Maya as well as friends and supporters.

After filing his paperwork, Caldwell touched base on his four key points if elected mayor: job creation, an integrated transportation system, finding a homeless solution and government transparency.

Earlier in the day, University of Hawaii engineering professor Panos Prevedouros filed his nomination papers. A few dozen sign wavers, who came out in support, draped him in lei. They said they are standing behind Prevedouros because he has a realistic plan to relieve traffic, address homelessness, and fix the sewer systems.

"This race is about who will manage taxpayer's money better," said Prevedouros. "The current city administration has already doubled property taxes since 2004 despite only 21 percent of it justified by increases in population and inflation and sewer fees went up 106 percent during this time."

A critic of the city's $6 billion rail transit project, Prevedouros said there are more efficient options for a mass transit system that would cost $2 billion.

But he said project spending needs to be practical with priority given to a legal agreement between the city and the EPA for a $7.2 billion sewer upgrade program.

"So either you got to do sewers or you got to do rail. But sewers is a consent decree, so you must do it. Therefore, my opponents cannot add billions and, you know, divide by population and make sense. So bottom line doing multiple projects is unaffordable," said Prevedorous. "Where's this money supposed to come from? We cannot go on bleeding our taxpayers dry like this."

Prevedouros is one of four candidates, including Councilman Rod Tam, former Honolulu Prosecutor Peter Carlisle and acting mayor Kirk Caldwell, running mayor during this coming September's special election.