Westminster police say a survey last month of motorists at four city intersections revealed that 78 percent of the drivers were wearing safety belts.
Police said the survey found that 85 percent of female drivers wore their seat belts, compared with 72 percent of male drivers.
The June figures indicate an increase for all drivers of 4 percent over May's seat belt use, officers said.
The June survey also indicated that 71 percent of all truck drivers were wearing the safety devices, up from 55 percent.
All motorcycle riders observed by the officers were wearing safety helmets, as required by state law, they reported.
City police conduct the surveys monthly in connection with the Maryland Comprehensive Traffic Safety Program's Golden Eagle traffic safety competition, sponsored by the State Highway Administration and a women's traffic safety group.
The officers who conducted the survey said they made four arrests for driving while intoxicated and issued 88 citations to drivers for exceeding the speed limit by 10 mph or more.
Cpl. Richard Ott was chosen Golden Eagle Officer of the Month for June for issuing 96 traffic citations and warnings.