Photo Source: liberali.ge
These yellow buses in Tbilisi are cheap but you get what you pay for. They have no air conditioning or decent suspension and are often overcrowded. However, they do provide a vital service that reaches the main areas of their cities. You can find out bus schedule and routes on the Tbilisi Transport Company web page.
Two points to note: Payment can only be made with exact change or using a prepaid transit card (which you can buy in every metro station) via an honor system when boarding. Fares are approximately $0.21 to ride. Be sure to hold onto your receipt on each ride because monitors will randomly board the bus or waiting at a the bus stop to check that passengers have paid. Common Georgian courtesies require riders to give up their seats to women, the elderly or anyone else looking less able bodied than you to endure the bar clinging, yellow rodeo bull of a bus.
Fares are almost same for buses in Batumi, although ticketing system is bit different. Tickets can be purchased in stores or on buses (price is higher). In other Georgian cities buses are old, obsolete and only cash is acceptable.
Recently there have been a small fleet of modern blue buses turning up on a few of Tbilisi’s major routes with advanced comforts like AC and adequate shocks.