|Local Names:||Colbert Freeway|
| between Cranston and Quinton, Adustelan |
Intercounty C21 is an Intercounty Limited Access Highway that runs from Skamplanck (in the county of Skamplanck) to Adustelan (in the county of Rilloq), connecting both cities with West Lakes (in the county of Sagemas).
In Adustelan, it is known as the Colbert Freeway. The route has a concurrency with Intercounty C4 (Dexonharzleman Expressway), resulting in a gap between Exit 7 eastbound in Cranston and Exit 7 westbound in Quinton.
|Rilloq||Adustelan||Honeydew District||5||Bartholomew Avenue|
|Cranston||6||Whitegale Avenue||Eastbound exit empties onto Mulaney Street|
|6A||New Villa Avenue||Westbound only, closest westbound exit to Crosscourts Arena|
|7||Two separate exits, concurrency with I-C4 from Exits 28-30|
|Bellamyville||Crosses Jennaviva River|
|West Piers||8||Jennaviva Boulevard||Eastbound only, to Dunnage Memorial Bridge|