Bucks County Recorder Of Deeds What's The Cheapest Way To Travel From Bucks County To Pittsburgh?

What's the cheapest way to travel from Bucks County to Pittsburgh? - bucks county recorder of deeds

My sister has just started college in Pittsburgh, and need a way without having to visit empty on my account. I live in the Newtown / Yardley area of Bucks County. Does anyone know a reasonable way to travel?