How is Connected Intersections Key to Intelligent Transportation Systems

Intelligent Intersection Control systems will continue to play an essential role in managing traffic in smart cities.

How is Connected Intersections Key to Intelligent Transportation Systems
connected-intersections-key-to-intelligent-transportation-systems

How is Connected Intersections Key to Intelligent Transportation Systems

As wireless communication entered almost every field, Connected intersections technology demonstrated the tremendous potential to improve the smooth flow of traffic. 

Connected Intersections control traffic patterns, communicates with autonomous vehicles and warn them of any dangers ahead. It provides precise, sharp, real-time visualization of traffic. 

Lack of attention, misjudging the situation, vulnerable road users all together results in road accidents. Active monitoring of intersections provides the driver time advantage to be on the safer side. 

Connected Intersections also help in reduced fuel consumption, less pollution, decreased road accidents, negligible traffic jams and time-saving.

In Helmond (Netherlands), an energy efficient installation project resulted in a 6% reduction of the time than before, which was 13%. Fuel consumption was reduced to 13%, and it resulted in 2.6% increment in speed.  The trial began in October 2010 under the scheme Urban Freight energy efficiency pilot. 

According to Elon Musk,“ the next step towards full self-driving capability involves the ability to navigate roundabouts, intersections and traffic lights successfully. Once the autopilot can do it safely, Tesla cars will be able to drive commuters to work without the need for human input.”

Automotive supplier Continental has already demonstrated Intelligent Intersection Technology to smart cities for safer roads ( October 2017).

In December 2018, Continental announced to show a series of future city technologies at CES Las Vegas. It included a demonstration version of its Intelligent Intersection Solution integrating DSRC ( dedicated short range communication), data feeds from traffic and sensor fusion to create a model of 3D view of the intersection. 

How does it work

An intelligent system for connected intersections consists of sensors placed at each road junction along with cameras, radar, Lidar system. They track each vehicle and communicate with each other to track speed, vehicle type, position and trajectory. A 360 degree model of the surrounding is created, which helps to identify and analyze the current state of the road and traffic surrounding the vehicle. 

Two types of wireless communication typically used in Connected Intersections are Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I). They share real-time data from traffic systems, i.e. “SPaT”  (signal phasing and timing), position, speed and acceleration.

DSRC: Dedicated Short Range Communications, use short or medium range wireless communication channel between vehicles, infrastructure pedestrians, to provide information about high-risk zone and interactions ahead.

Sls: Slot based interactions allow autonomous vehicles to cross the interactions through the gap between two vehicles that are coming from opposite directions. It works on the principle 'Slower is faster'.

IMA or Intersection Movement Assist is another application of connected intersections. It warns you if there are chances of colliding ahead with another vehicle or is it safe to enter a zone or not. In case there is an obstacle in your view, it warns you about the situation ahead. It could also tell if a vehicle is about to violate the traffic rule.

LTA (Left Turn assist), guides the driver whether it is safe to take a turn in front of another vehicle coming from conflicting direction?

Intelligent Intersection Control systems will continue to play an essential role in managing traffic in smart cities.