Hagerstown drivers are being asked to watch where they park on Wednesday.
If clear skies and low winds prevail, a plane will fly low over the city on Wednesday to photograph utility markings in city streets, said Assistant City Engineer Rodney Tissue.
If the weather is bad, the plane will take off on the next clear day.
Since many of the utility markings are along curbs, Tissue is asking drivers not to park over the white markings, which pinpoint utility components such as manholes, water valves, inlets, telephone poles, fire hydrants, street lights and transformers.
The symbols are in the shape of X's, plus signs, circles, brackets and ribbons, among others.
The area to be aerially photographed includes the city and some Washington County neighborhoods served by the city's Water Pollution Control Department. The neighborhoods involved in the work include Brightwood Acres East, Londontowne and near Wesel Boulevard.