Signpost 1: Obtaining
The characters are competing to win the Piston Cup and gain the favor of Dynaco. The tie in the race sets off the cross-country journey and the rest of the story.
Signpost 2: Understanding
LM is ready to pull over for Sheriff, until sheriff’s car backfires; LM thinks someone’s shooting at him, which leads to the crazy chase and the destruction of Radiator Springs’ Main Street.
As soon as Doc Understands who LM is, he says “let him go.” This causes conflict with Sally, who seeks to get the town to Understand why LM has a responsibility to fix the road.
Signpost 3: Learning
When Doc beats LM on the dirt track, LM realizes that he still has things to Learn about racing, and Doc eventually teaches him.
As soon as the Media Learn from Doc where LM is, they descend on the town and take LM with them.
Signpost 4: Doing
Conflict in the final act arises from all the things the characters are Doing - racing, cheating, crashing, and helping.
MC (assuming an action driver)
Signpost 1: The Past
As @hunter said, LM is a Rookie with “no history” trying to win his first race against cars with much more experience.
Signpost 2: Progress
In order to get out of Radiator Springs, LM must fix the road and is personally concerned with the Progress he is making on this (he tries to speed up his progress by rushing the job, but makes things worse for himself).
Signpost 3: The Future
Getting to know Sally, Mater and the rest, LM starts to question his own Future — if what he thought he wanted was really what he wanted.
Signpost 4: The Present
LM is dealing with The Present moment in the final race.
IC (assuming an action driver). This is the through line that I’m less sure of.
Signpost 1: Memory
If correct, this is thinly illustrated. The IC moment I see is when The King (as the IC stand in) tells LM he’s “talented but stupid” for not respecting his crew. (What does this have to do with Memory?)
Signpost 2: The Preconsious
Doc is infuriated when he hears someone has wrecked the town’s road, but he also makes an immediate, impulsive decision to send LM away as soon as realizes he’s a racer.
Signpost 3: The Subconscious
LM learns about Doc’s past and gets a warning about the direction of his Innermost Desires (but doesn’t Memory work better?)
Signpost 4: The Conscious
Not sure about this.
What do you think?