Request DDOT Services Listed below are the scheduled services provided by the District Department of Transportation (DDOT). Please click on any of the services below. Each link provides a detailed description of each service, scheduled response times, and procedures to address the occurrence of missed services. You can request any of the following services by calling the Mayor's Citywide Call Center at 311 or completing a service request on-line using the District government's Service Request Center. Alley Repair Curb and Gutter Repairs Grass and Weed Mowing Parking Meters Pavement Markings Pothole Sidewalk Repair      Street/Alley Light Street Repair Street Signs Traffic Calming Study Traffic Signals Tree-Related Services Utility Cuts