Toyota of Japan and French carmaker PSA Peugot Citroen officially launched commercial production at their joint-venture plant in the Czech Republic on Monday. The TPCA plant, located near the town of Kolin, is said likely to become the most efficient in the world. The plant will eventually be able to produce 300,000 cars a year; two thirds of them under the Peugeot and Citroen brands, the other third for Toyota. The TPCA joint-venture is the biggest new company in the Czech Republic. The cars should be available on the Czech market in June.