The patrol unit is the primary activity of the Sheriff's Office uniformed force. This unit supplies police services to the residents of the County on a twenty-four (24) hours a day, seven (7) days a week basis. The Patrol Unit has the responsibility of prevention and detection of crimes, protector of life and property, investigation and apprehension of criminals and traffic enforcement within Madison County. The Patrol Unit is broken down into four (4) tours of duty. First is the A-line tour from midnight to 8:00 a.m. Second is the B-line tour from 8:00 a.m. to 4:00 p.m. and third, is the C-line tour with hours from 4:00 p.m. to midnight. The fourth tour of duty is the D-line tour from 7:00 p.m. until 3:00 a.m. This tour helps to compensate for increased calls for service during certain high peak areas and times of criminal activity. Included in this tour of duty is the Madison County DWI Unit.
The Patrol areas are divided into four (4) zones which encompass all townships within the 658 miles of Madison County. During 2009, the Patrol Unit investigated 8,711 incidents or calls for service. Patrol officers made a total of 547 arrests for vehicle and traffic violations. Some of the calls for service and emergency include: motor vehicle accidents, alarms, death investigations, warrants and service of Orders of Protection. Patrol units also assist other police agencies within the county including the State Police.