The Not-So-Phantom Tollbooth is an easy challenge worth 1 Badass Rank found in the Bloodshot Ramparts.
After going down the stairs from the start of the area (past the vending machines), look for the traffic stop for the dam. There is a toll booth with a "Dahl" sign on it. On the side is a slot for money.
After paying $5 the challenge will be completed.
- The challenge title is a play on the title of the 1961 novel The Phantom Tollbooth.