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Brake lights in B mode

Posted: Wed Apr 08, 2015 6:18 pm
by Nfuzzy
Almost got rear ended again tonight. I think it's crazy that the brake lights don't come on any time your foot is completely off the accelerator when in B mode. After all people gently tap their brakes all the time with less deceleration and yet the lights come on.

Re: Brake lights in B mode

Posted: Wed Apr 08, 2015 6:34 pm
by cwerdna
If you truly believe this is a safety issue, you should file a formal complaint w/Nissan and NHTSA: http://www.safercar.gov/" onclick="window.open(this.href);return false;.

From page 9-15 of the '15 Leaf manual:
REPORTING SAFETY DEFECTS
For USA

If you believe that your vehicle has a defect
which could cause a crash or could
cause injury or death, you should immediately
inform the National Highway Traffic
Safety Administration (NHTSA) in addition
to notifying NISSAN...

Re: Brake lights in B mode

Posted: Wed Apr 08, 2015 8:34 pm
by LeftieBiker
How is it different from driving a standard shift car in one of the low gears, and taking your foot off the gas...?

Re: Brake lights in B mode

Posted: Thu Apr 09, 2015 6:40 am
by XeonPony
Report the idiot behind you that wasn't paying attention, nothing wrong with the car, just the morons head!

Never have I even been near rear ended when regen breaking, but I do fade it in, I just don't take my foot right off so I come to a screeching halt!

Re: Brake lights in B mode

Posted: Thu Apr 09, 2015 10:03 am
by Nubo
LeftieBiker wrote:How is it different from driving a standard shift car in one of the low gears, and taking your foot off the gas...?
Yeah, LEAF regen isn't any stronger than 3rd-gear engine braking on most of the manual-transmission cars I've had, even though most of them had engines of less than 2 Liter displacement.

That said, motorists seem to have become increasingly impatient over the last decade or so. Perhaps it's just the ubiquity of antilock brakes and directional stability systems that allows them to feel safe while cutting things closer. In any case as EVs become more mainstream it's probably a good idea for the DOT to come up with some rate of regen-induced deceleration past which a brake light must be activated. The EV knows speed and regen intensity and can easily calculate deceleration rate. A standard for brake-light activation would be a good thing.

Re: Brake lights in B mode

Posted: Thu Apr 09, 2015 2:15 pm
by knightmb
Nfuzzy wrote:Almost got rear ended again tonight. I think it's crazy that the brake lights don't come on any time your foot is completely off the accelerator when in B mode. After all people gently tap their brakes all the time with less deceleration and yet the lights come on.
If this happens at night, your tail lights are already on. You increase car distance at night for that exact reason, so I agree with the others here, you just had the bad luck of having drivers behind you that don't know how to drive.

Re: Brake lights in B mode

Posted: Thu Apr 09, 2015 2:37 pm
by RePo
That's why I have a DVR in the back window. I already have their license plate and the fact that their on the phone while tailgating me.

Re: Brake lights in B mode

Posted: Mon Jan 23, 2017 7:22 pm
by Y8UYGAS
I think this would be a great idea. The B mode is plenty powerful to warrant brake lights. The argument that people should be paying attention is lame. People DON'T pay attention (I also cycle commute) and in the dark it is hard to judge speed differences. I've driven mostly manual trans cars before this and would never use the engine braking as often as with the Leaf. I would coast down hills and to stop signs to increase fuel savings, there was little to benefit from engine braking for normal driving.

Re: Brake lights in B mode

Posted: Tue Jan 31, 2017 4:53 am
by arnis
No. Up to 30kW regen is acceptable without brake lights. It is just smooth deceleration.
No surprises.
There is no data that suggests Leaf's get rear ended more due to regen.

But going way above 30kW it gets more reasonable.

Re: Brake lights in B mode

Posted: Tue Jan 31, 2017 7:56 am
by Durandal
RePo wrote:That's why I have a DVR in the back window. I already have their license plate and the fact that their on the phone while tailgating me.
Good point. I need to add my rear "dash cam" to my Leaf. I keep dawdling.