System for traffic monitoring and traffic state reporting through the QLTC-8C automatic traffic counters
The concept of the system
Traffic Agent® system is an application, which enables automatic traffic monitoring and reporting on traffic state through automatic counter devices and represents an upgraded basic function of vehicle counting and classification. The concept of the system is based on a very capable and precise traffic counters, namely the QLTC serieses, and on modern
telecommunications and information technology, which enables publishing of traffic data in real time on the worldwide web.
The definition of a traffic state for each driving lane individually is based on measured values in a selected time interval according to:
• average speed of vehicles,
• average time between driving vehicles, and
• occupancy of the carriageway, given in promilles, as a ratio between the occupancy time of measuring sensors and time of interval observation.
When defining traffic states the values of previously defined parameters are also considered. The parameters are determined for each counting location and for each driving lane individually, based on empirical observations:
• low marginal speed of vehicles,
• normal marginal speed of vehicles,
• high marginal occupancy of the carriageway,
• low marginal occupancy of the carriageway,
• short marginal time between vehicles,
• normal marginal time between vehicles.
GREEN – Normal traffic
The system detects the state normal traffic when the rate of the vehicles in a queue is low or when there is no queue at all. The speeds of the vehicles are within the average speed of the measuring point or higher.
BLUE – Increasing traffic
The system detects the state increasing traffic when the number of vehicles is increased; however, the average distance between the vehicles remains relatively big. The speeds of the vehicles are within the average speed of the measuring point or higher.
YELLOW – Dense traffic
The system detects the state dense traffic when the majority of the vehicles is driving in a queue, however, the speeds of the vehicles are within the average speed typical of the
measuring point concerned or even higher.
ORANGE – Heavy traffic
The system detects the state heavy traffic when vehicles are driving in a queue with a speed that is a little bit lower than the average speed typical of the measuring point concerned.
RED – Heavy traffic with traffic congestions
The system detects the state heavy traffic with traffic congestions when vehicles are driving in a queue with a very low speed or when vehicles fully stop from time to time on the measuring point.
BLACK – No traffic
In case no vehicle passes the measuring point in a selected interval (5 minutes), the device submits the state No traffic.
BLACK – No data
If more than 30 minutes have passed since the last traffic state detection for an individual measuring point and there isn’t any new information due to eventual communication outage
or traffic counter error, the system erases the last traffic state and gives the value “No data”.
Contact for more information:
MIKROBIT d.o.o., Ulica arhitekta Novaka 13, 9000 MURSKA SOBOTA, Slovenia
Phone: +386 2 530 00 50
Fax: +386 2 530 00 51