Spectrum
I’ve read a study from the Spectrum. Imagine an intersection without a traffic light, where auto computers can determine who will drive first right on the move. This approach will save roads from traffic jams and significantly speed up traffic.
How it works:
- all cars broadcast their position, speed, and direction using a special wireless protocol;
- VTL algorithm collects the data from all cars and imposes them on digital terrain maps;
- at the entrance to the intersection the algorithm assigns the lead car;
- the driving car slows down in front of the intersection, it turns on the red light for its direction and the green light for the perpendicular one;
- after this, the algorithm assigns a new driving machine;
- everything repeats those who waited, pass the intersection.
What are the advantages of this technology:
- No downtime at traffic lights, which allows you to optimize traffic.
- The model was based on maps of Pittsburgh and Porto that showed a reduction in typical travel time by 30–60%.
- Traffic is optimized even if only some of the machines support VTL technology.
- Does not require expensive sensors and technologies (lidars, etc.)
Disadvantages:
- “Very few auto models support the wireless DSRC protocol (dedicated short-range communications) which is a what the system is built on.
- Cyclists and pedestrians don’t really fit into this scheme. It was offered to track people with the help of cameras and computer vision or to give people lightweight sensors (both options are so-so).
The technology is very interesting, we will keep our eye on it.
