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Thread: Is A Flashing Rear Brake Light Legal

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    Regular Member Ben H's Avatar
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    Default Is A Flashing Rear Brake Light Legal

    I.e is a normal civilian car allowed to display a red flashing light to the rear of the car? Silly question I know cause you can replicate this by jumping up & down on the brake pedal but have been looking at these

    http://cgi.ebay.co.uk/B480-PULSING-B...QQcmdZViewItem

    These were advertised in a trade mag I had come through & was telling my dad about them as he's a driving instructor & can not do enough to make the rear of his vehicle more noticeable. Lost count how many times he gets smacked up the rear.
    He got tugged by a traffic cop for having day time running lights & the copper was trying to say they were fog lights but he carried the box round in his boot so copper asks "why have them?" My dad replys with "well it made me stand out to you didn't it, why do you think your Volvo you are driving has them factory fitted?"

    Not sure if you can have a flashing red light aswell as a stationary red light at the same time showing to the rear of the vehicle.

    Can you imagine fitting these on a Vec, how crazy will it send the on dash warning display?

    Was gonna rig him up some yellow strobes which start flashing if a pupil stalls at a junction as this is where most of his incidents happen as people just presume they have moved on.

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    Regular Member DennisTheMenace's Avatar
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    The vectras have adaptive rear brake lights anyway , good idea if it only activated under really hard braking to warn people , braking normaly is just crying wolf in a way , and makes you look like a numpty.

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    Regular Member Ben H's Avatar
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    What is adaptive rear brake lights on the Vectra, not heard of that one.
    I think this one says it uses G Force technology so the harder you brake the faster it flashes.
    In my mag it claims it gives improved reaction time of 0.23 seconds giving at 50mph an extra 4 meters braking distance. Can't be bad.

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    Regular Member DennisTheMenace's Avatar
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    The clusters light both tailbulbs instead of just the top ones if you mash the brake pedal hard enough to activate the ABS .

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    Regular Member Swatty's Avatar
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    I’m sure I remember someone telling me that the hazards come on if you break hard in a citroen (new model, not sure which one)

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    Regular Member DennisTheMenace's Avatar
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    The C5 and C6 , i think the C4 does it as well . must get a renter and give it a go ....

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    [Ex]Admin Duncan's Avatar
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    Quote Originally Posted by Ben H View Post
    I.e is a normal civilian car allowed to display a red flashing light to the rear of the car?
    Yep, this is allowed since, as mentioned above, the Vectra C and Signum have had Adaptive Brake Lights fitted for a while now.

    Adaptive Brake Lights (ABL) – If the driver brakes hard enough to activate the ABS function the brake lights flash on and off at a frequency of four times per second, thus warning following vehicles that heavy braking is in progress.

    Quote Originally Posted by Ben H View Post
    He got tugged by a traffic cop for having day time running lights....
    Going off topic for a second....You mean he was pulled for having headlights on in the day?!! If so, how the hell can a cop pull you for that and what was the reason he gave? Curious as I have my headlights on all the time, whether it's summer, winter or whatever. A car with headlights on during the day, even on a bright summers day, is so much more noticeable than one without. Something carried over from my biking days.

    D

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    Regular Member sig63's Avatar
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    Vehicle : Opel Insignia

    Trim : Cosmo

    Engine : 2.0 CDTI

    Year : 2011

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    Quote Originally Posted by Duncan View Post
    Adaptive Brake Lights (ABL) – If the driver brakes hard enough to activate the ABS function the brake lights flash on and off at a frequency of four times per second, thus warning following vehicles that heavy braking is in progress.
    That is what I thought and that is what my manual says;
    however the Vx prefacelift manual confirms what Dennis wrote: "Adaptive brake light - During full-on braking, the tail lights light together with the brake lights at the same brightness as the brake lights."

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    Regular Member Ben H's Avatar
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    You mean he was pulled for having headlights on in the day?!!
    No they were an aftermarket day time running light. Golf ball like shaped lights which we mounted in the OE fog light holes which were blanked off as he didn't have front fogs. They would come on with ignition but go off when any lights were switched on i.e dawn dusk or darkness where having them on still would be like having fogs on.
    Can see why the copper pulled him at first but even after being shown they turn off as soon as you switch any other lights on, side or dipped he still wasn't convinced.

    Yes you can just drive with headlights on all the time, I do to especially on motorways but as his is a driving school car he wanted this to happen without pupils having to do it.

    Back to ABL, getting the ABS to kick in for the lights to start flashing is a bit extreme. I've only had the ABS on mine work once & that was when we first got it & I wanted to see how well the brakes performed. We don't get up to enough speed round the lanes to need ABS.

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    Regular Member DennisTheMenace's Avatar
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    Quote Originally Posted by sig63 View Post
    That is what I thought and that is what my manual says;
    however the Vx prefacelift manual confirms what Dennis wrote: "Adaptive brake light - During full-on braking, the tail lights light together with the brake lights at the same brightness as the brake lights."

    Ah diddnt realise they flash like ******y , just thought they lit the 2 sidelight bulbs each side to full brightness , must RTFM

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