However, the destruction of Jellyfish Fields would prove to be Plankton's downfall. Moments after Mr. Krabs was finally preparing to hand over the Krabby Patty Formula to his nemesis, Bikini Bottom was invaded by hordes of jellyfish aggressively seeking a new home. Realizing that the creatures would only stop their attack if Jellyfish Fields was restored, the citizens of Bikini Bottom aided SpongeBob in destroying Plankton's highway.
A Superhighway in real life is call an Interstate (in most cases) and is 3 to 8 lanes going to two different ways. And in this episode its is 2 lanes in the city going in one way. Which is not realistic for it to be a Superhighway.
There are Yellow Lines going thought the middle of the highway. In real life there is no country in the world that uses Yellow Lanes to show the the different lanes, But only to show the that is an oncoming lane. Sense it is an one way Superhighway this doesn't make sense.
There are no guard rails on the bridges.
There already was a highway in the Bikini Bottom WAY before this episode. Seen in Mid-Life Crustacean.
It is unknown who the Shelly Superhighway is named after, although it could be named after seashells.
Another possibility is that Plankton used the name "Shelly" to hide his identity so people will approve of the highway; a plan that succeeded in tricking even Mr. Krabs.
The name "Shelly" could also reference Plankton's first name, "Sheldon."
The Shelly Superhighway seems to always end or start at the Chum Bucket. This was part of Plankton's plan, as the highway was also meant to draw away the Krusty Krab's business to his own establishment
Aside from his scheme in The SpongeBob SquarePants Movie, the Shelly Superhighway may be one of Plankton's greatest plans yet, as he actually managed to force Mr. Krabs to admit defeat and prepare to hand over the Krabby Patty Formula. The plan was only thwarted by the Jellyfish invasion of Bikini Bottom, which provided the people with an incentive to help SpongeBob destroy the highway and restore Jellyfish Fields.
Squidward is the only one of the main cast that isn't involved in the destruction of the Shelly Superhighway.
Shelly Superhighway is also a parody of the Sunrise Highway.
The Shelly Superhighway makes lots of air pollution, which makes the sky turn a Dark Gray color an makes the clouds look like they are melting.