  In the US, thousands of Pan, Tilt, and Zoom (PTZ) traffic cameras monitor
highway conditions. There is a great interest in using these highway cameras to
gather valuable road traffic data to support traffic analysis and
decision-making for highway safety and efficient traffic management. However,
there are too many cameras for a few human traffic operators to effectively
monitor, so a fully automated solution is desired. This paper introduces a
novel system that learns the locations of highway lanes and traffic directions
from these camera feeds automatically. It collects real-time, lane-specific
traffic data continuously, even adjusting for changes in camera angle or zoom.
This facilitates efficient traffic analysis, decision-making, and improved
highway safety.
