I think it would be easy for Nissan to also innovate with a system like this in Nissan Leaf because:
- The stop lights in the Leaf are already like 2 LED VU-meter vertical bars.
- The regenerative power information is already shown in the dashboard (although I'm not sure if it is directly related to the breaking pressure, it's a start)
I think over all this would increase the safety of the car, because there are some drivers that should keep a safe distance behind and when the front car breaks, they might break too hard and so on for the driver behind. This is a known problem in Portugal where lots of drivers tend to keep glued to the front car at any speed.
I don't understand why I haven't seen any car with a similar system, could this be considered not legal under current laws? (anyway the middle STOP light should act normally as it always have been (ON/OFF).
- The stop lights in the Leaf are already like 2 LED VU-meter vertical bars.
- The regenerative power information is already shown in the dashboard (although I'm not sure if it is directly related to the breaking pressure, it's a start)
I think over all this would increase the safety of the car, because there are some drivers that should keep a safe distance behind and when the front car breaks, they might break too hard and so on for the driver behind. This is a known problem in Portugal where lots of drivers tend to keep glued to the front car at any speed.
I don't understand why I haven't seen any car with a similar system, could this be considered not legal under current laws? (anyway the middle STOP light should act normally as it always have been (ON/OFF).
Its a more descrete way.. 
