As vehicles more than doubled in recent years, traffic fatalities have increased especially in a country where private car ownership was banned until the early 1990s. Some experts also attribute the increase to the above road structural problems, lack of buckling up, the use of alcohol, excessive speed, and unaccustomed drivers such as expats returning home. In an effort to curb such a phenomenon, mobile police patrols have been deployed, road signage improved, and speed radars installed on major roadways and city intersections.