They say this is because the red warning lights aren't visible in fog or low cloud.
BBC: London helicopter crash: What are the rules for pilots?
Despite Tuesday's gains, there were plenty of warning lights for skeptical investors to point to.
Fat profits are no reason to sell but to the eye they flash like warning lights to me.
The RAIB said Mr MacKay may not have seen, or misinterpreted, the warning lights at the level crossing.
Anybody in their right mind would see huge flashing warning lights and alarming klaxons blaring every indication that you should be skeptical.
FORBES: A Look at The Diplomatic Skills of Sean Smith, AKA 'Vile Rat'
Each passage in the building was at least eight feet wide, and each corner was fitted with warning lights, to prevent employees bumping into each other.
"It is incredible that, despite some highly publicised incidents, some people are still putting their lives on the line by ignoring warning lights and sirens, " he said.
BBC: Level crossings: Wales safety work after 33 near misses
However, the RAIB also said Mr MacKay may not have seen, or had misinterpreted, the warning lights at the level crossing and appeared not to have been wearing glasses to improve his distance vision.
Moreover, it'll dial 911 and alert your relatives should you get in an accident, and perhaps most intriguingly, it'll send full diagnostic reports to your iPhone whenever a warning indicator lights up.
ENGADGET: Automatic Link converts your iPhone into a personal driving assistant (video)
The red Fire Warning light is bad news when it lights up, but you can silence the alarm bell by pressing it.
The developments are reportedly right in line with the US government's Vehicle Infrastructure Integration (VII) Initiative, and we're sure officials are mighty proud of the E-Flare, which provides optical and acoustic warnings coupled with a force-feedback gas pedal, and E-Horn, which accepts incoming warning signals from emergency vehicles and alerts the driver via (presumably distracting) in-cabin lights and sounds.
ENGADGET: Continental telematics safety system alerts drivers of impending hazards
People don't realize that lead is all over their homes in a wide variety of products, particularly in things like extension cords and wire and cable, your holiday string lights when you're stringing them up this year, you'll probably see a warning label that says that the product contains lead, known to be a toxic chemical in the state of California.
应用推荐