Remember the painfully long lines to vote last November?

Well, Salt Lake County Clerk Sherrie Swensen does, too.

So while it’s no presidential election, but a primary for city races and the 3rd Congressional District Republican runoff in some areas, Salt Lake County is tripling the number of voting centers — from 12 to 36.

“There will be no long lines this time, I promise,” Swensen said.

That’s good news for voters, many of whom waited in lines for up to four hours in November, shocking election officials who had expected most people to mail in ballots and angering residents and state lawmakers.

Tuesday may officially be Election Day, but Monday is the deadline for by-mail ballots.

“If people are voting by mail, their ballot must be postmarked by Monday,” said Swensen.

Also, early in-person voting is available Monday — an extension allowed by a new state law replacing one that cut off early voting the Friday before an election. Sites for in-person voting Monday or Tuesday are listed online at vote.utah.gov.

People who miss mailing ballots Monday may still drop them off Tuesday at voting centers or drive-up drop boxes that some counties offer.

On Tuesday, polling locations with traditional voting machines will be open from 7 a.m. to 8 p.m.

A change this year is that no counties will offer Election Day voter registration. A state law allowing so-called same-day registration expired, so people not already registered now are out of luck for the primary.

However, Swensen said that if people have registered somewhere in the state previously but failed to change their address, they may still cast a provisional ballot at an in-person voting center by showing identification and proof of new address.

Also, unaffiliated voters living in the 3rd District who would like to vote in the GOP congressional primary may still do so if they fill out papers at voting centers to officially register as Republican. That is required because the Republican Party has a closed primary that excludes unaffiliated voters or registered Democrats.

The hottest race in the state is the GOP congressional runoff pitting Provo Mayor John Curtis, former state Rep. Chris Herrod and investment adviser Tanner Ainge.