He is leaving to go to Pennsylvania. His mom is scared that hes going to get hurt. Him and his mom are really close to each other.
When ever Adam was driving he saw the hitchhiker. When he swerved to he ran off of the bridge. When he swerved off the bridge he crashed.
He was on his was to the Pennsylvania Turn Pike. When he was on his was he seen the hitchhicker. The hitchhicker asked him for a ride somewhere and he took her there.
Adam and the hitchhiker were arguing and she got out of the car. But then when Adam was driving down the road he seen the hitchhiker again. But he didn't take her anywhere this time when he seen her walking.
When ever Adam got to a place where he could called his mom someone he didn't know answered the phone. The guy said that his mom went to the hospitable because she had a mental break down.
When he got to the hosbilie he realized that his mom was dead. His mom died because when ever she found out that Adam crashed when he went to cross the bridge he had died. He didnt know that he was a ghost the whole time.