Vehicles started rolling after a gap of three and half years as Qatar and Saudi Arabia reopened their land border on Saturday.
Saudi Arabia had shut its border in June 2017 as part of a package of sanctions it said was a response to Doha’s backing for “terrorist” groups and closeness to Iran.
Qatar always denied the charges.
Qatar confirmed that traffic at the Abu Samrah crossing, 120 kilometers south of Doha, resumed at around 7am GMT.
Saudi Arabia, along with the United Arab Emirates, Bahrain and Egypt which had also imposed an embargo on travel and trade, agreed to lift the restrictions at a Gulf Cooperation Council summit on Tuesday.
On Jan. 4, Kuwaiti Foreign Minister Ahmad Nasser Al-Sabah announced that the two countries have agreed to reopen the airspace, land and sea borders.
Qatar has announced strict coronavirus control measures for those arriving from the Saudi side that will require travelers to present a negative test result, undergo a fresh test at the frontier and quarantine in a government-approved hotel for one week.