This spring, commissioners of the Port Authority of New York and New Jersey will begin re-examining the agency's $27.6 billion 2014-23 capital plan adopted by the board in February 2014 under a different chairman and very different circumstances

Replacement of the 65-year-old Port Authority Bus Terminal in Manhattan emerged last summer as priority for the agency, with cost projections of $8-10 billion revealed last month. On top of that, elected officials want the Port Authority to chip in $3 billion to the Gateway trans-Hudson rail tunnel proposed by Amtrak.

Transit advocates, business groups and other stakeholders are hoping their pet projects are not dropped, postponed or scaled back under a revised capital plan, which Port Authority Chairman John Degnan and Vice Chairman Scott Rechler said could take several months to complete.

The hundreds of items in the capital plan include a list of 11 "major projects" that account for 40 percent of overall spending, and represent the biggest potential savings. Although not on the major projects list, the $4.9 billion World Trade Center redevelopment program for 2014-18 is also part of the capital plan. Degnan and Rechler both ruled out a toll hike, and Commissioner Ken Lipper said selling agency assets could raise up to $8 billion and allow the new bus terminal to move forward without supplanting other projects.

Here are five of the plan's current projects or programs that could be revisited, based on experts' assessments and the commissioners' criteria.

World Trade Center Redevelopment Extension of PATH rail service from Newark Penn Station to Newark Liberty Airport Greenville Yards Grove Street Station LaGuardia Airport Redevelopment Program

Port Authority scholar Jameson Doig and other experts said the most appropriate project to revisit is the $1.5 billion extension of PATH service to Newark Liberty International Airport, though Degnan, Rechler and Lipper refused to single out any potential targets of the revision process.

The capital plan's other major projects are: a $2 billion redevelopment of Newark Liberty International Airport's Terminal A; $1.8 billion Lincoln Tunnel access program, including the ongoing Pulaski Skway overhaul; $1.5 billion replacement of the Goethals Bridge; $1.4 billion Lincoln Tunnel Helix replacement; $1.3 billion raising of the Bayonne Bridge roadway; $1.2 billion replacement of the George Washington Bridge suspender ropes; $249 million Harrison PATH Station replacement.

Port Authority Projects 5 Gallery: Port Authority Projects

Steve Strunsky may be reached at sstrunsky@njadvancemedia.com. Follow him on Twitter @SteveStrunsky. Find NJ.com on Facebook.