Be sure to release her in the direction where she was goiing. Like ACROSS the street she was trying to cross. Sounds like (supposition) she laid already and was heading back to the lake/pond.

I saved a painted turtle earlier this year. Crossing the road, too. Kept her/him for a day at the Visitor Center and on Sunday I let her go ACROSS the road she was trying to cross.

Believe in their direction. They know.