Why do road maintenance vehicles need bright flashing lights?

Page may contain affiliate links. Please see terms for details.

Drago

Legendary Member
Location
The Urban Fringe
The danger is with doing unproven things for safety's sake is that they can often have the opposite effect.

For example,as far back as the 80s Suzuki, and then Honda, independently discovered that over-bright day time lights increase the likelihood of a collision (I've explained the mechanics behind the phenomenon on here so do a search if youre interested.)

This got very little publicity in the UK, really only reaching a small motorcycling audience as Superbikes magazine ran a piece on potential then forthcoming European law affecting motorcyclists and they touched upon it.

And yet despite this, we see cyclists slapping on stupid bright daytime lights on like some kind of forcefield, breaking up their visible outline, depriving the observer of the visual cues required to accurately judge speed, and then wonder why they still get wiped out.

It has also been proven that yellow fluorescent have a camouflage effect against a green background, rendering them potentially useless against the green background of a hedgerow or rural environment. This is why search and rescue teams wear red Keela jackets, or dual-colour fluorescents is liable to be near traffic. And yet who slips on a yellow florrie for a rural bike bimble without giving it a second thought, thinking about how jolly safe it makes them?

If a thing doesnt have a reasonably proven safety benefit then best not to do it, regardless of how strong common sense on the matter may seem, as theres a fair change of it doing the opposite. True safety is not intuitive, and commkn sense should not be used anywhere near it.

Stuck to a lucky rabbits foot - at least its unlikely to do you any harm.
 
Last edited:

Oldhippy

Cynical idealist
Absolutely bang on @Drago wasn't there an experiment in the past where people became hi viz blind due to everyone wearing it? A group of us o motorcycles years ago got waved over by the traffic guys and insisted we take the hi viz they were giving away for our safety. We reluctantly took them and placed them on top a bin in the lay by as we rode off.
 

classic33

Leg End Member
The danger is with doing unproven things for safety's sake is that they can often have the opposite effect.

For example,as far back as the 80s Suzuki, and then Honda, independently discovered that over-bright day time lights increase the likelihood of a collision (I've explained the mechanics behind the phenomenon on here so do a search if youre interested.)

This got very little publicity in the UK, really only reaching a small motorcycling audience as Superbikes magazine ran a piece on potential then forthcoming European law affecting motorcyclists and they touched upon it.

And yet despite this, we see cyclists slapping on stupid bright daytime lights on like some kind of forcefield, breaking up their visible outline, depriving the observer of the visual cues required to accurately judge speed, and then wonder why they still get wiped out.

It has also been proven that yellow fluorescent have a camouflage effect against a green background, rendering them potentially useless against the green background of a hedgerow or rural environment. This is why search and rescue teams wear red Keela jackets, or dual-colour fluorescents is liable to be near traffic. And yet who slips on a yellow florrie for a rural bike bimble without giving it a second thought, thinking about how jolly safe it makes them?

If a thing doesnt have a reasonably proven safety benefit then best not to do it, regardless of how strong common sense on the matter may seem, as theres a fair change of it doing the opposite. True safety is not intuitive, and commkn sense should not be used anywhere near it.

Stuck to a lucky rabbits foot - at least its unlikely to do you any harm.
Didn't do the rabbit much good though, and it'll had four of them.
 

Pat "5mph"

A kilogrammicaly challenged woman
Moderator
Location
Glasgow
Stuff appears, pulls out, runs out, falls out, amd we should all be driving at a speed that will allow us to stop when it does. Just because it looks clear now doesnt mean it will be in one seconds time.
I commute by bike at 6.30 am.
Because it's so early I use a vey busy during the day straight road.
This road has, even so early in the morning, cats crossing, wildlife crossing, pedestrians getting to the train station, cars pulling out from driveways, dog walkers crossing, even joggers running on the road because the pavements are uneven.
But the few cars, mostly taxis and vans, speed like there's no tomorrow till the next traffic lights.
One day someone will get hurt, hopefully not me.
 
Location
Widnes
Main thing about hi-viz early and late in the day

is that a lot of them have reflective stripes that give the drivers something moving to notice

or less excuses if they don't anyway

On which point i have also stuck a load of stripes on my bike facing in every direction for the same reason

none of which stopped that nurse running me over in her black merc a year or so ago!!
I wasn;t hurt - bike mostly OK - cheap mirror was broken and chain guard was in bits but fixable

but she managed to not see a bloke witha white helmet
yellow jacket
various colours of hi-vis stripes on his bike
AND riding down the middle of the road as I was turning right into the road she was turning right out of (i.e. a t-junction and she was on the minor road)

so it does suggest hi-vis is not the all saving panacea that some people seem to say!
 

classic33

Leg End Member
Main thing about hi-viz early and late in the day

is that a lot of them have reflective stripes that give the drivers something moving to notice

or less excuses if they don't anyway

On which point i have also stuck a load of stripes on my bike facing in every direction for the same reason

none of which stopped that nurse running me over in her black merc a year or so ago!!
I wasn;t hurt - bike mostly OK - cheap mirror was broken and chain guard was in bits but fixable

but she managed to not see a bloke witha white helmet
yellow jacket
various colours of hi-vis stripes on his bike
AND riding down the middle of the road as I was turning right into the road she was turning right out of (i.e. a t-junction and she was on the minor road)

so it does suggest hi-vis is not the all saving panacea that some people seem to say!
3M, a major manufacturer of Hi-Vis workwear, amongst other products, state clearly that after just ten washes their material needs replacing.

Personal users don't have the same limit placed on them, but should consider the limits imposed by the manufacturer. I still see people in a workplace environment, who are oblivious to this little piece of information on the sheet supplied with the garments. And we have the cleanest of Hi-Vis round these parts being worn by bin men/waste operatives.
 

katiewlx

Über Member
Indeed. It prevents someone’s lawyer from taking the Mickey by claiming reduced compensation because you weren’t conspicuous. It’s worked at least once. A fellow club member had their compensation reduced because their bike clothing wasn’t deemed visible. A law professor is also a club member; he told me that he wears hi-vis to avoid a legal palaver if he were ever hit by a car.

When a driver hit me, the legal form I completed asked what I was wearing but didn’t explicitly mention hi-vis. It also asked a separate question on whether I had lights on, so my conspicuity was evidently material.

None of this relates to the evidence for hi-vis clothing’s efficacy.

surely thats just down to lawyers lawyering though and your club member who was hit got hung out to dry by their lawyer.

I remember when I was a witness to a cyclist getting hit, I was asked whether they were in hi-viz, they werent, not that it would have made a difference anyway as they got t-boned, but as I said to the officer who posed me the question, but I still flippin saw them, which seemed to satisfy the extent of the questions purpose.
 

Gillstay

Veteran
When stopping cars for tree felling on to roads a high vis can help. Sensible ladies stop for them no difficulty at all.

Holding a large chainsaw in a butch manner always helps. People don't like perceived threats.

Yet who ever got injured in their car from a chainsaw ? Life's weird.
 
Top Bottom