Traffic Sensor; Used to Collect Road Traffic Information (such as Traffic Flow and Vehicle's Speed)
Traffic sensors are used to collect road traffic
information for signal control, and the data collected is also supplied to the
Vehicle Information and Communication System Center (VICS Center). A sensor
detects the presence of a vehicle using the reflection of ultrasonic waves
transmitted from ultrasonic transmitters/receivers installed directly above the
road. They are used for the purpose of measuring traffic volume and occupancy
rates by means of a stable sensory function. It is used to collect traffic
flow, vehicle's occupancy, length, and speed.
According to Coherent
Market Insights the Traffic
Sensor Market Global Industry Insights, Trends, Outlook, and Opportunity
Analysis, 2022-2028.
The Inductive Loop Detector (ILD) sensor is one of the
most commonly used traffic sensor. ILD is one of the most popular traffic
detector in use. It works on the basis of
the principle of mutual inductance and detects vehicles by measuring the change
in inductance due to the presence on top of the sensor. The change in voltage measured is commonly called the vehicle
signature and is the raw output from the detector system. ILD sensors are one
of the most widely used traffic sensors because of their high accuracy and cost
effectiveness.
Traffic
sensors also help improve the capacity and efficiency of transportation
networks. Several types of traffic sensors, such as passive infrared sensors, passive
acoustic sensors, magnetometers, ultrasonic sensor, microwave radar sensors,
laser radar sensors, inductive-loop detectors, and video image processors are
available in the market. Application of these sensors includes measurement of
vehicle volume, mainline control, traffic signal control, and incident
detection. However, there are different types of traffic sensors and they fall
into several categories.
Each
of these has its own specific uses but all are designed to provide information
about traffic levels in a controlled environment. Each of these types of
sensors can be used to detect a number of different events. According to the U.S.
Federal Highway Administration (FHWA), over the past years, sensor
manufacturers have developed new, more effective vehicle detection
technologies, such as traffic sensors, particularly for over-roadway sensors.
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