Continuity mistake: When the band is playing in the background at El's house you can clearly see that one of the band members has a cigar in their mouth, but when the camera cuts to the band playing the cigar is gone.
Continuity mistake: In the scene in the diner, the waiter fills Josh's coffee up three quarters full, but in the next clip of the two boys, Josh's coffee is full right to the brim.
Continuity mistake: Twice towards the end of the film (as we see the bus arriving at Austin, then also as it arrives back home) the bus has a front number plate (clearly visible on the front bumper during the montage driving shots), then soon afterwards it disappears.
Visible crew/equipment: When E.L. shows up ouside the diner the others are eating in the van he stole. He and Josh chat for a sec. After Josh boards the bus the boom mic bounces around in the reflection of the window above E.L.'s head.
Deliberate mistake: In the scene when the boys jump the car over the bridge and the wheels fall off, after EL and Josh get out of the car you can see that the rotors are fine. However, if the wheels did fall off like it shows, then the lugnuts would be stripped out.
Continuity mistake: When they jump the bridge they land on the left side of road (right side of the screen) when they show the shot of them walking away the car is on the right side of the road (left side of the screen).
Continuity mistake: When Tom Green is playing the guitar (after the mouse has been dropped in and the snake's head is somewhat near it) the hand with which he plays the guitar switches several times as the view of his face switches. When it's a profile view, he strums on the neck of the guitar with his left hand. When it's a straight view, he plays the bottom of the guitar with his right hand.
Continuity mistake: When the guys are walking away from the car and it explodes, from one angle Sean William Scott has his hand up under his chin, but from the reverse angle it's down at his side.
Continuity mistake: In the scene where Josh is having the dream that Tiffany is watching the tape with her friends, when the camera zooms in on Tiffany as the movie is playing, look behind her head in the mirror and you will see the movie scene where Beth walks towards Josh in her underwear. It then goes to the television, where it plays the same scene again, then continues.
Factual error: The envelope sent to Austin, Texas has the ZIP code 50321. This is a zip code for Des Moines, Iowa. All Austin ZIP codes start in 78.
Continuity mistake: Not only does Josh only put three stamps on the letter and at the end and in the dream sequence it has eight, but in fact in the same scene (at the beginning where he actually puts the stamps on), the number of stamps changes from three to eight with only a few seconds in between.
Continuity mistake: When the guys are singing in the bus and the shot is on Josh, Rubin is in the background clearly facing the rear of the bus with his head buried but only a milli-second later he is facing forward and singing himself.
Continuity mistake: In the scene where the "fat" girl is sitting on the swing flirting with the geeky guy, she smiles and has perfect, straight teeth, in no need of braces. Later, in the scene where the geeky guy is introducing the fat girl to his dad at the door, the fat girl smiles and has braces on.
Continuity mistake: When Josh and Beth are making the sex tape in his room with his camera, his legs (and some other minor parts of his body) are in an entirely different position from what is seen later on the sex tape whenever someone watches it in the movie.
Continuity mistake: There is a snake in a glass cage in the dormitory room. Several times in the same scene the snake completely changes positions in the cage.
Continuity mistake: The car has no number plate holder on it when the guys first get in it, but when they're standing on the bridge just about to jump it, the car has a number plate holder.
Factual error: Why is it that when Kyle and the Fat girl are on the swing, her side is down about 1 and a half feet from him. It's supposed to be funny because she's fat. But it's not becuase metal chains are holding the bench.. you cannot bend metal that thin that far without breaking it.
Factual error: First, there is no Ithaca University in Ithaca, New York. The two main universities are Ithaca College and Cornell University. Second, Ithaca, New York doesn't look like that.
Visible crew/equipment: When the snake attacks Jacob on the neck the camera zooms in and goes down with him.To the left you can see the camera's shadow very briefly. It's definitely the camera because Beth and Barry are over the room.
Continuity mistake: In the scene where the car blows up after jumping the bridge they walk away from the car and are lined up just before it explodes and after it explodes E.L. turns slightly then realises that he's not supposed to yet he quickly turns back. This is before they all turn around in unison.
Answer: I found what appears to be a full transcript at http://www.tvdance.com/movie-scripts/roadtrip/ although it annoyingly lacks labels on who is speaking each line.
DavidK93