Taxi Service

Taxis in the French Riviera are abundant and easily accessible; however, because most of the towns are so small there is usually an imposed minimum fee of 8 euros per cab ride. Nice, the biggest city in the riviera, is mostly walkable but if you're trying to get to the Musee Chagall from Old Town or the Promenade des Anglais, a cab is worth it. It is easy to catch cabs on the curb and it might be more convenient and time-saving than taking buses to certain attractions.

At the peak of tourist season (July-August), traffic becomes a problem if you are trying to get from one town to another via taxi during the day but if you miss the last train or bus back to your hotel, keep in mind that most towns on the Riviera aren't very far from each other, especially if your accomodations are in a central location (such as Nice.)

Rental Cars

Renting a car is also an option for exploring the French Riviera and this service is available at airports and large railway stations. Although renting a car can make many areas that are unreacheable by public transportation accessible, it is drastically more expensive than renting a car in the US. Also, mostly all available cars are manual transmission. You have to make advance reservations for automatic cars and these are only available in the large cities. Traffic is a concern in the summer: taking secondary roads or public transportation is a good alternative.

(http://www.tripadvisor.com)