The Traffic & Transportation Department maintains a traffic count program, conducting scheduled counts on major arterial roads and collector streets, and specific location counts for special needs. Traffic counts are used in several ways: as a baseline for evaluating the impact of additional traffic from new developments; to help traffic engineers create coordinated traffic signal timing along arterial streets; to track upward and downward trends that are used for long range planning; to determine the need for additional left or right turn lanes at intersections; and for specific traffic-related requests and studies.
Counts on arterial streets are conducted annually, and on major collector streets every two or three years. The counts are gathered over a 24-hr. period during a typical work week. Vehicles are counted as they pass over tubes fastened to the roadway. A traffic volume flow map is produced from these counts, showing the overall volumes along each major arterial street. An annual report includes the traffic volume flow map, a map of the count locations, and the latest count information for each location including 24-hour and peak hour volumes, date, and day of week. Click here to see the current and historical Traffic Count Reports.
The Traffic & Transportation Department also conducts counts needed to perform studies for new traffic signals, multi-way stop control, the neighborhood traffic calming program, special event planning, new developments, and others. These special counts include 24-hour tube counts and/or manual counts during specific time periods.