There are government-operated trams and buses running across the city. There are also many taxis, registered and unregistered. Uzbekistan has plants that produce modern cars. The car production is supported by the government and the Korean auto company Daewoo. In May 2007 UzDaewooAuto, the car maker, signed a strategic agreement with General Motors-Daewoo Auto and Technology (GMDAT, see GM Uzbekistan also). The government bought a stake in Turkey's Koc in SamKochAvto, a producer of small buses and lorries. Afterward, it signed an agreement with Isuzu Motors of Japan to produce Isuzu buses and lorries.