Uploaded March 2026 | Updated September 2026, 1 week ago
In this video, I build a circular road system with 22 LEGO cars to recreate real traffic flow and find out when traffic suddenly breaks down. Each car is programmed to behave like a human driver, reacting to the distance of the car in front by braking and accelerating.
By gradually adding more cars, a surprising result appears: at a certain point, traffic becomes unstable and a traffic jam forms out of nowhere.
I also tested different types of drivers, including normal human drivers, distracted drivers, and self-driving robot cars. The results show how even small differences in behavior can completely change the flow of traffic.
The system uses a magnetic guidance mechanism inspired by Miniatur Wunderland, where vehicles follow hidden steel tracks inside the road.
The road system was fully 3D printed using a Bambu Lab H2D and designed in Shapr3D.
This experiment is inspired by the famous traffic flow experiment by Yuki Sugiyama.
Software for programming the cars: pybricks.com
3D Printer: bambulab.com/en/series/h2
BrickController2 (App to use Gamepad with Lego): bit.ly/3JypnV0 Where I get my Lego parts from: bricklink.com/v2/main.page
00:00 Motor
00:58 Steering
02:01 Design
02:26 Street
03:08 more cars
03:36 Human driver
05:46 Robots
06:42 ?
07:20 vs robot
08:14 me vs human
08:39 fast
Music:
Addict (Instrumental) - NEFFEX(1)
The Awakening - Patrick Patrikios
Cherokee Shuffle - Nat Keefe & Hot Buttered Rum
Manic - Jeremy Korpas
Waltz of the Flowers (by Tchaikovsky) - Tchaikovsky(1)
#bricktechnology
#legotechnic
#lego
#asmr
#buwizz
#engineering
In this video, I build a circular road system with 22 LEGO cars to recreate real traffic flow and find out when traffic suddenly breaks down. Each car is programmed to behave like a human driver, reacting to the distance of the car in front by braking and accelerating.
By gradually adding more cars, a surprising result appears: at a certain point, traffic becomes unstable and a traffic jam forms out of nowhere.
I also tested different types of drivers, including normal human drivers, distracted drivers, and self-driving robot cars. The results show how even small differences in behavior can completely change the flow of traffic.
The system uses a magnetic guidance mechanism inspired by Miniatur Wunderland, where vehicles follow hidden steel tracks inside the road.
The road system was fully 3D printed using a Bambu Lab H2D and designed in Shapr3D.
This experiment is inspired by the famous traffic flow experiment by Yuki Sugiyama.
Software for programming the cars: pybricks.com
3D Printer: bambulab.com/en/series/h2
BrickController2 (App to use Gamepad with Lego): bit.ly/3JypnV0 Where I get my Lego parts from: bricklink.com/v2/main.page
00:00 Motor
00:58 Steering
02:01 Design
02:26 Street
03:08 more cars
03:36 Human driver
05:46 Robots
06:42 ?
07:20 vs robot
08:14 me vs human
08:39 fast
Music:
Addict (Instrumental) - NEFFEX(1)
The Awakening - Patrick Patrikios
Cherokee Shuffle - Nat Keefe & Hot Buttered Rum
Manic - Jeremy Korpas
Waltz of the Flowers (by Tchaikovsky) - Tchaikovsky(1)
#bricktechnology
#legotechnic
#lego
#asmr
#buwizz
#engineering
