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the ministry of industry and information technology recently again publicly solicited opinions on the mandatory national standard "technical requirements and test methods for passenger car braking systems", and relaxed the relevant regulations on "prohibiting the car from being completely stopped with a single pedal".

in the new draft opinion, the content related to "prohibiting the vehicle from stopping completely with a single pedal" has been revised: in the default working state, the braking effect achieved by releasing the accelerator pedal alone should not slow the vehicle down to a stop;

if the electric regenerative braking system has more than one working state, it should re-enter the default working state or set the working state as required by the driver each time it is powered on. the vehicle manufacturer should provide the method for setting the working state free of charge through the user manual or electronic data record;

you can understand this as the vehicle cannot be in "single-pedal complete brake stop mode" in its default factory state. at the same time, each time the vehicle is powered on and started, it should support memorizing the default factory settings or the mode set by the driver.

at the same time, the newly revised document also changes the requirements for lighting up the brake lights for energy recovery. as electric regenerative braking systems are increasingly used in new energy vehicles, for braking functions such as those achieved by releasing the accelerator pedal, some current models can produce a large braking deceleration, and the brake lights need to be lit to alert the vehicles behind and other traffic participants, eliminating traffic safety hazards such as rear-end collisions.

the document states that after the brake signal is issued, the signal should continue to be issued as long as the deceleration demand continues to exist. however, the signal can be suppressed when the vehicle is stationary or the deceleration is reduced to the deceleration corresponding to the issuance of the brake signal.

in addition, appropriate measures (e.g., hysteresis, averaging, delay, etc.) should be taken to avoid flashing of the brake lights due to rapid changes in the brake signal.

the single-pedal mode will be banned, which has also sparked heated discussions among netizens. some car owners expressed support for this decision, but some others opposed it.

supporters say that this model is too unsafe, and that previous similar accidents are good examples.

opponents say that someone who is truly proficient in using a single pedal for a long time would not step on the wrong pedal in an emergency.

the traditional pedal logic is that the brake pedal controls the car's deceleration and emergency braking, and the accelerator pedal controls the car's acceleration. when you slow down too much, you need to switch to the accelerator pedal and lightly step on it to increase the speed. if you accidentally increase the speed too much, you need to switch to the brake pedal to control the speed and prepare for braking.

tesla's single-pedal logic is that acceleration and deceleration are controlled by the accelerator pedal. the brake pedal has a single function and is only used for emergency deceleration and braking. it usually does not have to bear the responsibility for daily acceleration and deceleration during driving.

the advantage of this is that you don't need to switch between the two pedals frequently, and the functions of the two pedals are simpler and clearer than those of traditional pedals. therefore, the habit formed by long-term single-pedal driving should be: in an emergency, the first thing to do is to release the accelerator pedal immediately.