Second to none, Prague's public transportation system is user-friendly, relatively inexpensive, and infiltrates all parts of the city. The two main single-use ticket categories are 30 minute tickets allowing passage on any form of transport, as well as transfers, for a total time of 30 minutes after validation for CZK 24 for adults, or 90 minute tickets offering the same ease of use and flexibility for CZK 32 for adults for a total of 90 minutes after validation. Longer term tickets are available for adults for CZK 110 for 24 hours, CZK 310 for 72 hours, and monthly, quarterly, and annual passes are also available. Reduced fare categories include children from 6- 15 years of age, juniors, students, and seniors between 60 and 70 years of age. Tickets can be purchased in “tabak” stores, some “potraviny” or mini markets, and at all metro stations, as well as select tram stops. Tickets can also be purchased by sms/text message unless you use your mobile phone on a rechargeable credit system. Tickets absolutely must be validated before entering the metro, or immediately upon entering a bus or tram. Fines are steep and ticket checkers have little sympathy. Prague's public transportation is considered to be very safe, except for the occasional pickpocket which you should take precautions against, and very reliable with delays or strikes being very rare. Prague residents typically avoid driving in the city-center, knowing that with ease and speed they can be transported to various corners of the city at a low price in comfort and now in style, with the newest tram models having been designed by the Porsche Design Group. Losing points only for handicap accessibility, Prague's public transportation company DPP is making great strides to remedy this situation with the addition of the new low-floor accessible trams by Porsche, and buses which feature wheelchair-accessible adaptations and design, as well as inclined or vertical lifts for wheelchairs and strollers at many metro stations. Although not all metro stations have elevators installed, the ones that are accessible are clearly marked on transportation maps and easy to find. For further information see