The most reliable and extensive domestic transport is bus - you will get to most parts of the country.
Chisinau is the main transportation hub for the country. The three bus stations serve every city and town in Moldova. The fastest form of transport are small minibuses which seat around 15 people. Larger buses are also used and are marginally safer, because they travel at slower speeds.
In Chișinău there is a state run trolleybus system which includes many new vehicles. Fare is currently 2 lei, a conductress collects fares and issues tickets. There is also a 'bus service which operates with fewer routes.
Minibuses rutierele in Moldovan Romanian; marshrutki in Russian are available in most cities. They are privately operated and are called by requesting the vehicle to stop, however can often be very crowded. Drivers should be paid on boarding currently 3 lei in Chișinău, however some insist on sitting down first and by passing the money to the person in front of them to pass to the driver, so don't be alarmed if random people behind you start handing you money.