If the car was designed to stay in the city, they need to stop saying things like:

"Select your Zipcar, pack your tent and pick your spot, from national parks with campsites to choice spots listed on USACampgrounds.info." [1]

Besides, even driving on the freeway between two cities, you can often find dead spots. Imagine pulling into a rest area in the middle of nowhere for a bio-break, only to find yourself stranded.

[1] https://www.zipcar.com/ziptopia/best-vacations-for-solo-trav...