HAIL, 30 June — Two trucks overturned at a dangerous turning near Oqbat Khareeta on the Tabuk expressway, blocking the busy road for about an hour, Al-Riyadh reported yesterday. A truck driver told the Arabic daily that several accidents had taken place in the area over the past months. A number of Saudi drivers have called upon the Communications Ministry to take quick measures to prevent recurrence of such accidents on the expressway.