That money was provided to the corrupt apparatchicks and is either long gone or successfully parked off shore
A couple of years ago my son and DIL took a scenic road trip from the east coast to AZ and back.
They called it the “Crumbling American Infrastructure” tour.
I still remember the story of the company that got about $1800 per sign to advertise the construction project jobs that were displayed along the highways.
Of the $1.2 trillion, only $80 billion went to actual Public Works projects. The city where I worked at as the PW Director got $150,000 to repave a busy intersection. I was reluctant to take that because of all of the added regulations that came with the ARRA.