Poland's Foreign Minister Radoslaw Sikorski and his visiting Belarussian counterpart Syarhey Martynau signed here on Friday an agreement on local border traffic, Xinhua News Agency informed.In line with the agreement, visa-free traffic in the border zone will require a permit valid for 2 years in case of the first permit and for 5 years in case of successive permits, according to a report of the Polish news agency PAP.