Automobiles should be rented only when public transportation and taxis/Uber are impractical, more expensive, or not available. Vehicles up to an intermediate (midsize) class are customary for individual travelers. The next size class may be rented only when three or more people are traveling together. Rented vehicles should be charged to a purchasing card to take advantage of insurance provided by the credit cards, and the loss damage waiver offered by the rental car company should be declined.