Methods of non-restroom urination while on a road trip:
(This applies mainly to males but females can utilize some of the principles.)
Method 1 of 3: Peeing inside the vehicle:
Males: Pee into an empty container such as a bottle or cup. Discard after use.
Females: Move to the edge of the seat and pee directly onto the car mat. (If your car mats do not have rubber bottoms, women are advised to use the men's method.)
Method 2 of 3: Peeing outside a driving vehicle:
Males: Use the "open door technique". If traveling in a van, just open the door to pee on the street.
Females can also pee out of a driving car. Just open the window, stick your butt out of it, and commence peeing. Don't forget to wipe afterwards.
Method 3 of 3: Peeing outside a standing vehicle:
Males: Look to find a tree or bushes to hide.
Women: Squat by side of the car. Hide between the open doors, facing the car. Have tissues, toilet paper, or...