Flashing cycle lights???

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garrilla

Senior Member
Location
Liverpool
On the front I have a single EL5300 on constant. I wear suffiecient hi-viz that oncoming traffic should see me. I don't cycle on any paths where I would have to worry about oncoming cyclists.

On the rear I have a LD1100, which has two banks of 5-leds so I have the lower bank on constant and the other on flash. Then I also have two fibre-flares on the stays, on constant, alathough these are new and have replaced two LD130S on constant on the stays.

I also have the 4 x Crane hi-viv straps with red LEDs, one for each ankle and upper arm. Although to be honst, I rarely turn them on, but do so if I'm concerned enoug.
 
I use two front lights and two rears. I was worried that a pair of front lights (quite) close together would look to a moton like a car a long way away, rather than a close-up bike .. especially to a moton looking out through a letterbox wiped in their misted up / ice encrusted windows. Basically the issue siadwell mentioned.

Also aware that flashing lights are harder to tell speed from, I just have one flash and one on steady .. seems to work for me. And seems quite a common approach, from what I can make out from other responeses on this thread.

At the back, one of the Cateye TL whatevers on the seatpost (on steady) and a cheapy Tesco 3-LED job (flashing) which attaches neatly to the back of my crash helmet seems to get me noticed.

I also figured it's good to have two lights front and rear in case one should fail for whatever reason.
 

J4CKO

New Member
Davidc said:
last year there was a man round here who had fixed a plastic LED illuminated Christmas tree on the back of his bike rack. Looked crazy.

Probably not as daft as it sounds, may serve to humanise how he looks to drivers, suggests a sense of humour and a bit of fun, possibly mentally unstable ;)

Until some right on local Council employee, usually white spots it and stops him based on it being offensive to trees or something.
 

iacula

Senior Member
Location
Southampton
There seems to be a consensus that a flashing light , at least on it's own, makes it harder for approaching vehicles to judge your and distance & speed. The assumption is that this is bad, but may it also be safer? Will not other road users give you a wider berth when passing you because they are not quite sure where you are?

I am regularly overtaken far to closely and quickly by motorists who are too confident about where I am, fortuneatly to date they have been right, but it scares the sh*t out of me!

I'd rather the odd driver is disorintated and therefore slows down than that I'm dead.
 
iacula said:
There seems to be a consensus that a flashing light , at least on it's own, makes it harder for approaching vehicles to judge your and distance & speed. The assumption is that this is bad, but may it also be safer? Will not other road users give you a wider berth when passing you because they are not quite sure where you are?

I am regularly overtaken far to closely and quickly by motorists who are too confident about where I am, fortuneatly to date they have been right, but it scares the sh*t out of me!

I'd rather the odd driver is disorintated and therefore slows down than that I'm dead.
My initial reaction to the bit in bold was "you'll be b****y lucky!!" but then I thought a bit more, and read the rest of your post, and it's kind of the approach I take to lighting and reflectives in the winter: I try to make motons have to pause and think a bit by wondering exactly what it is they're dealing with. At least that way I've got their attention ..
 

jonny jeez

Legendary Member
Simon, really good thread, I've never really stopped to think about it, just hit the factory setting and set off.

This thread, including the different viewpoints has really opened my eyes. I had no idea about the distance judgement issue (which now seems to make perfect sense).

I'm going to have to rethink my lighting arrangement this weekend.


Thanks for the heads up.
 

GrasB

Veteran
Location
Nr Cambridge
iacula said:
There seems to be a consensus that a flashing light , at least on it's own, makes it harder for approaching vehicles to judge your and distance & speed. The assumption is that this is bad, but may it also be safer? Will not other road users give you a wider berth when passing you because they are not quite sure where you are?

I am regularly overtaken far to closely and quickly by motorists who are too confident about where I am, fortuneatly to date they have been right, but it scares the sh*t out of me!

I'd rather the odd driver is disorintated and therefore slows down than that I'm dead.
Well one problem is you're working in a fail dangerous scenario. You're relying on the normal reaction of "I duno what's going on I'll be more cautious", not everyone follows that. Some time ago the highways agency/local council put up some 6' fencing on the approach to A505/M11 roundabout at Duxford, most drivers slowed down because they couldn't see, however there was a significant minority of drivers who charged down there with complete disregard for the fact they couldn't see traffic on the roundabout it's self. As a result I saw some rather nasty pieces of braking from cars as suddenly a car doing high speed would come into view. Now I'm sure there was never an accident there, as most people drove sensibly, but what would have happened if you had 2 people driving quickly & arrive at just the wrong time?

The other big problem is some times you fool the other road user into thinking that one scenario is going on but actually it's something different*. Every time you cause confusion on the road you increase thinking times & typically reaction times also increase as people are having to do more thinking just to make normal progress. Another thing is why have you got the right to deprive other road users of my attention while I spend far longer working out where you are, the direction you're travelling in & your speed?

Yes flashing lights are nice, they grab attention & get you noticed but please, for your & other road users safety add a solid light into the mix.

BM: I have no problem with a flashing light as long as there's a second solid light source. I don't even care which light is flashing, primary or backup, as long as there's a constant light to judge speed, distance & direction by.

*eg. me missing that cyclist, he was riding on the wrong side of the road so I thought he was on the other side of the trees as I couldn't work out exactly where he was. Yes I was cautious & just stopped part way across the road letting him through but had I pulled out quickly I could have easily taken the guy out before I knew what had happened.
 

iacula

Senior Member
Location
Southampton
Fair comment GrasB, I do actually follow your advice one solid and two flashing rear lights, one of the flashing lights hanging off my off side pannier bag. A configuration I tried for the first time this morning, anything to look unusual.... I was sure that cars that had the time and space gave me even more room. As is ever the case though, if they'd pulled out and had to overtake quickly, my safety was of secondary importance to their getting to work on time!
 

Hacienda71

Mancunian in self imposed exile in leafy Cheshire
I don't know if the law has changed but there was definitely a view when LED bike lights came out a few years ago that flashing lights on their own where not legal and had to be accompanied with a constant when it was dark. This may well be heresay but judging by peoples posts seems sensible anyway.
 

garrilla

Senior Member
Location
Liverpool
#########################
Warning
- Seriously and dangerously
outdated information
- now completely wrong.
##########################

The Law: The Road Vehicles Lighting Regulations 1989

The Section: Lamps to show a steady light

Lamps to show a steady light
13.—(1) Save as provided in paragraph (2), no vehicle shall be fitted with a lamp which automatically emits a flashing light.

(2) Paragraph (1) does not apply in respect of-

  • (a) a direction indicator;
    (;) a headlamp fitted to an emergency vehicle;
    (c) a warning beacon or special warning lamp;
    (d) a lamp or illuminated sign fitted to a vehicle used for police purposes;
    (e) a green warning lamp used as an anti-lock brake indicator; or
    (f) lamps forming part of a traffic sign.
##########################
The correct regs are here
##########################
These regs were updated in 2005 to make flashing lights on bikes legal.

http://www.opsi.gov.uk/si/si2005/20052559.htm
 
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