President Karzai is slated to sign a trilateral agreement with Iran and Uzbekistan on transit cooperation, he told reporters.

Karzai is due to leave for London Wednesday and will be in Tehran following visits to Jordan and Switzerland.

The visit is on an official invitation by President Mohammad Khatami, Deputy Iranian Ambassador to Kabul Hashem Ashjazadeh said.

"The trip coincides with the visit by the Uzbek President Islam Karimov to Tehran," he added.

Representatives of Iran, Uzbekistan and Afghanistan have agreed here Monday to sign a draft agreement on building a road from Iran to Central Asia via Afghanistan and Uzbekistan.

During a meeting, Iranian Minister of Roads and Transport Ahmad Khorram, Uzbek Deputy Prime Minister Elyor Ganiev and Afghan Minister of Public Works Abdul Ali declared their countries' commitment to establish the so-called "Rahgozar" corridor.

Khorram, noting the positive effects of the reconstruction process in Afghanistan, said that the Islamic Republic has allocated three to four million dollars for the construction of the Milak bridge and road.

"Iran is to allot 43 million dollars for the construction of the 125-kilometer Dogharoun road," he added.

He further said that Iran has decided to establish a rail link from Torbat Heidarieh, in the eastern province of Khorassan, to Afghanistan's Sangan and Herat.

"This project will also link neighboring Afghanistan to the high seas as well as to central and northern Europe," Khorram added.