Graded yellow

Deceleration indicator

Yellow & Green:



– Predictable driving: 

Present a yellow triangle warning indication, shown less than
0.10 of a Second-

Immediately at the beginning when the accelerator start to release
In order to indicate deceleration intentions, human or autonomous.

Begins along with the green (and after) from a speed of 30mph (ca. 48 km/h) and up. 

– Improves other road users orientation by pre – ahead anticipate vehicles behavior. 

– Improves other road users perception & reaction time- 

With the components of stopping distance and human factors
a delay of 1, 2, 3 and even up to 4 seconds is possible.

In a speed of 110mph (ca. 177 km/h) we can reduce at the final stopping process between 28 to 100 meters.
This way, the tailgating cars, motorcycles and other road users will more likely be able to stop in time  

That means:
Save lives, prevent accidents or reduce their severity!

Perception &  Reaction Time:

Autonomous vehicles continue to multiply,
They respond much faster than other road users and stop immediately.

Perception time:
How long will it take to see the hazard?
The brain realize it is a hazard requiring an immediate reaction?
This perception time can be as long as ¼ to ½ a second.
In cases of- Inattention, Lower concentration levels, Tiredness, Alcohol, Children in the back, Mobile distractions and more- 
Perception time become longer.

Once the brain realizes danger – Only now it’s time to react!

Reaction time:
after ending the phase of perception time- 
How long will it take to release from the accelerator pedal and move in to the brakes pedal? 


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