You can clear your next destination and stop receiving turn by turn guidance as follows:

• Tap >
• When asked Clear Next Destination? tap Yes. 

In order to remove a stop on the map from a trip, click on the red dot representing the stop. 

Tap the blue arrow next to the place name.

At the bottom of the screen, tap Delete Stop. The screen will return to the trip display map.

In order to clear the current trip, tap  at the top of the screen.