With Democratic presidential nominee Barack Obama holding a sizable advantage leading up to election day, the networks don’t expect a repeat of the last two elections, when anchors stayed on the air till the wee hours without a projected winner.

There will be other differences this year as well.

The broadcast and cable networks have much more online coverage planned, and a greater number of networks will be covering the election live, including first-timer TV One, the African-American focused cable channel.

Here’s a look at the broadcast and cable networks’ plans for Tuesday night. (Note: This story will be updated throughout the day.)

* ABC – “World News’” Charles Gibson, “Good Morning America’s” Diane Sawyer and “This Week’s” George Stephanopoulos anchor “Vote 2008,” airing from 7 p.m. to 2 a.m. A special edition of “Nightline” will follow at 2:35 a.m. ABCNews.com will provide four live streams on election day, including video from the John McCain and Barack Obama election headquarters.

* CBS – “CBS Evening News” anchor Katie Couric will anchor the broadcast, which will air from 7 p.m. to 2 a.m. At 2 a.m., she will anchor a live webcast on CBSNews.com and CNET.com, as she’s done following every debate and all of the political conventions.

* NBC – “Nightly News” anchor Brian Williams will host coverage starting at 7 p.m. In addition to commentary from Chuck Todd, Tom Brokaw and other NBC political regulars, the network will offer live updates on its NBC mobile service.

* Fox – From 7 p.m. to 10 p.m., Fox News Channel’s Shepard Smith will anchor “You Decide 2008.” Sunday host Chris Wallace, former President Bush aide Karl Rove and former vice presidential candidate Geraldine Ferraro will offer commentary.

* Telemundo – NBC Universal’s Spanish-language network will offer live coverage during “Al Rojo Vivo con Maria Celeste” and “Noticiero Telemundo,” stretching from 5 to 7 p.m. It then segues into “Decisión 2008,” with hosts Pedro Sevcec and María Celeste Arrarás, who will also take questions submitted by viewers online.

* Univision – The dominant Spanish-language network will have its most extensive election coverage ever, beginning at 7 p.m. Jorge Ramos and María Elena Salinas will anchor the coverage, which will focus not only on the presidential election but also on several state-level ballot initiatives that affect Hispanics. Univision also has an interactive element for the first time, hosting online chats at Univision.com and offering mobile updates through Univision Movíl.

* PBS – “The NewsHour” offers live coverage starting at 9 p.m., anchored by Jim Lehrer.

* Al Jazeera English – The network will air a 12-hour marathon from its Washington, D.C., headquarters.

* BBC America – In cooperation with BBC, coverage begins at 6 p.m., including commentary from former “Nightline” host Ted Koppel.

* BET – BET will air a special election-focused “106 & Park” at 6 p.m., followed by “Be Heard Election 2008” from 8 to 11 p.m. with host Jeff Johnson. The network will air news crawls on the bottom of the screen all day to keep voters updated and BET.com will stream “Heard” from 8 p.m. to midnight in addition to taking viewer submissions about their voting-day experiences.

* CNBC – The network has a special “Your Money, Your Vote: Decision 2008” airing from 7 to 11 p.m., with three different anchor teams trading off hosting duties. The network’s big names, including Larry Kudlow and Maria Bartiromo, will make appearances.

* CNN – “Election Night in America,” anchored by Wolf Blitzer, begins at 6 p.m., with Campbell Brown and Anderson Cooper also appearing. The network will remain live from 1 a.m. to 5 a.m. as well, following a live midnight airing of “Larry King Live.” CNN.com will stream “America” and include all-day live updates from anchor Melissa Long. Headline News will air a special edition of “Lou Dobbs Tonight” at 9 p.m.

* Comedy Central – The network’s chief satirists, “The Daily Show’s” Jon Stewart and “The Colbert Report’s” Steven Colbert, co-host a live special at 10 p.m.

* Fox Business Network – The 1-year-old FBN kicks off its first election coverage starting at 6 p.m., anchored by Neil Cavuto. The network will focus partly on world market reaction to the election.

* Fox News Channel – Anchoring his final election, soon-to-retire Brit Hume will lead the network’s coverage starting at 6 p.m., with hosts Sean Hannity, Alan Colmes, Bill O’Reilly and Greta Van Susteren offering commentary. On Foxnews.com, a live webcast of “The Strategy Room,” anchored by Brian Wilson and Martha MacCallum, will be available starting at 5 p.m.

* MSNBC – Coverage begins at 5 p.m. with anchor David Gregory, but the network’s talking heads, including Keith Olbermann and Rachel Maddow, will be making frequent appearances. Live coverage will continue through 6 a.m., with Chris Jansing subbing in for Gregory at 2 a.m. At MSNBC.com, there will be live streaming coverage from NBC networks as well as a special electoral map download that updates results down to the county level.

* TV One – The cable network aimed at African Americans will for the first time ever offer election night coverage, starting at 7 p.m. “Election Night ’08: A Vote for Change” will be anchored by CN8 host Arthur Fennell, XM Radio host Joe Madison, and “Tom Joyner Morning Show” correspondent Jacque Reid and will have a panel of black experts offering commentary.