The A 485 is one of two completed portions of an abandoned plan to extend the A 49 to Darmstadt.

Heading northbound, the first part that is encountered is a trumpet interchange with the B 3a freeway.

The B 3a continues northbound, while A 485 traffic is required to exit the freeway to the right.

After exiting, the A 485 continues on a shorter stretch of freeway, passing the Marburger Straße junction before ending at a trumpet with the A 480.

All three parts are signed as junction 1, and both trumpets are named Gießener Nordkreuz.