Use Siri, Maps, and the Maps widget to get directions on iPod touch
You can get travel directions in the Maps 
app in several ways.
Get directions from Siri
Ask Siri. Say something like:
“Get directions to the nearest coffee shop”
“Find a charging station”
“Give me directions home”
Tip: To use “home” or “work” when searching in Maps or asking Siri, add your home and work addresses to your My Info card in Contacts. See Add your contact info on iPod touch.
Tap for directions in Maps
Do one of the following:
Tap a destination (for example, a landmark on a map, a spot that you marked with a pin, or a search result in Maps).
Touch and hold any spot on the map.
Tap Directions on the information card.
Use the Maps widget
To quickly get directions to a likely destination from the Home Screen, use the Maps widget.
To get directions, iPod touch must be connected to the internet. To get directions involving your current location, Location Services must be on. (See Control the location information you share on iPod touch.)