It is now legal to drive 65 mph on the Grand Island stretch of the Niagara Thruway.
Eight new speed limit signs were posted along the highway Thursday.
"Everything's up and ready to go," Thruway Authority spokesman Patrick Noonan said.
The speed limit on the Grand Island stretch of the I-190 was raised officially last week by the state Thruway Authority board, though signs weren't posted yet.
Noonan said the signs would have been posted sooner but frigid temperatures froze the ground.
Conditions improved slightly Thursday, allowing the replacement work to begin.
Trustee Jeffrey D. Williams of Lewiston proposed the speed limit increase in November for uniformity's sake: The Niagara Falls portion of the highway is already 65 mph.
After conducting a study, the Thruway Authority board on Jan 17 approved the increase.