From South Route 51 or West Liberty Ave.
Take Route 51 or West Liberty Ave. to the Liberty Tunnels and get in the left lane. Once through the tunnels, get into the right lane of the Liberty Bridge and follow signs to Route 579 to the Veterans Bridge. On the Veterans Bridge, follow signs to Route 28 North, via the Etna Exit, which will be the first exit on the right. From Route 28, take exit 6 for the Highland Park Bridge. Once on the Highland Park Bridge, get into right lane and exit onto Butler Street. Stay in right lane, and at the second light, turn left onto Baker Street. Make another left into the Zoo parking lot.