Gov. Kathy Hochul of New York is exploring options for reviving a congestion pricing plan for New York City before President-elect Donald J. Trump has a chance to kill it, according to four people familiar with the matter.

Ms. Hochul’s move to salvage the contentious plan comes as she faces pressure from various corners, including a group that represents transit riders and is planning to start an advertising blitz on Monday in support of the tolling program.

The plan that Ms. Hochul, a Democrat, is now exploring differs slightly from the one she halted in June. She is trying to satisfy opponents who had complained about the $15 congestion-pricing toll that most motorists would have had to pay as well as supporters who want to reduce car traffic and fund mass transit improvements.

The governor has talked to federal officials about the possibility of a $9 toll and about whether such a change might require the lengthy, involved process of additional environmental review, according to a Metropolitan Transportation Authority board member familiar with the matter. The discussions were first reported by Politico.

Mr. Trump, a Republican, has said he opposes congestion pricing, and his victory on Tuesday has apparently pushed Ms. Hochul to try to find a compromise.

“The timing is everything,” said Danny Pearlstein, a spokesman for Riders Alliance, the riders’ group that is planning the ad blitz. If congestion pricing has not started by January, he added “it’s very unlikely it would start.”