It's clearly bright yellow.

Besides, you shouldn't have to be threatened with a speed camera to just stay under the bloody speed limit. It's literally a crime not to, and besides that it's reckless and dangerous.

Idiots that speed in cars deserve a special kind of hell where they're tortured by all the children their kind have murdered.

Sucks to be whenever you are I guess. I'm used to that way they work where I live.

Fixed speed camera housings located within an area of street or highway lighting should be coloured yellow either by painting both the front and back of the housing or covering both the front and back of the housing with retroreflective sheeting. In an area not covered by street or highway lighting, the speed camera housing should be treated with yellow retroreflective sheeting.

https://assets.publishing.service.gov.uk/media/5a819278e5274a2e87dbe588/dft-circular-0107.pdf

In the US every state I've seen has to put multiple warning signs out, starting about a mile out. It's 100% obvious.

Yep, that's an 8.5% mortality increase on freeways and 2.8% increase on other roads. Better keep the brake down.

Maybe you guys ought to campaign to get the law changed. They used to be grey over here, but pressure was put on the government and how they're all high vis yellow with loads of warnings before them.

Nice of you to take that out of context.

Thirty five studies met the inclusion criteria. Compared with controls, the relative reduction in average speed ranged from 1% to 15% and the reduction in proportion of vehicles speeding ranged from 14% to 65%. In the vicinity of camera sites, the pre/post reductions ranged from 8% to 49% for all crashes and 11% to 44% for fatal and serious injury crashes. Compared with controls, the relative improvement in pre/post injury crash proportions ranged from 8% to 50%.

Authors' conclusions: Despite the methodological limitations and the variability in degree of signal to noise effect, the consistency of reported reductions in speed and crash outcomes across all studies show that speed cameras are a worthwhile intervention for reducing the number of road traffic injuries and deaths. However, whilst the the evidence base clearly demonstrates a positive direction in the effect, an overall magnitude of this effect is currently not deducible due to heterogeneity and lack of methodological rigour. More studies of a scientifically rigorous and homogenous nature are necessary, to provide the answer to the magnitude of effect.

the consistency of reported reductions in speed and crash outcomes across all studies show that speed cameras are a worthwhile intervention for reducing the number of road traffic injuries and deaths

They know they're objectively beneficial, and now they just want to firmly measure to what extent that is. They nonetheless express zero doubt that it's positive based on the existing evidence.