When I did my update on the experimental pedestrian crossing in Ayr’s Main Street recently, I had completely forgotten about another diversion made to catch, this time at night.
That hadn’t really been the reason for the diversion though, and what I really wanted to do was satisfy my curiosity about a detail.
Since the coach heading home has to pass this installation (without stopping), and it’s always dark (at this time), I’d noticed the exclamation mark signs always seemed to be bright, regardless of when I spotted them, but I had noted they were just flat plates when I first looked, rather than being mounted in a light box, like most existing signs.
I had also noticed a lot of excess wiring bundles behind the hardware (well, this is an experimental setup).
I’m still not sure (mainly because these signs also have retro-reflective coatings), but these signs do seem to be illuminated, despite being thin (only a few millimetres thick), and may be EL (electroluminescent), although I wouldn’t have thought ideal for an outdoor installation, due to the higher than normal AC voltage they need.
They could be using some form of LED light source, as being constantly developed for flat-screen TVs.
Compare the appearance of these flat plates to the conventional overhead downlit illumination of the No Right Turn sign, or the lightbox of the One Way arrow.
![](https://secretscotland.wordpress.com/wp-content/uploads/2024/05/night-at-the-crossing.jpg)
Note the lighting provided on the central refuge, to illuminate anyone standing there waiting to continue to cross.
A closer look doesn’t really betray much more.
![](https://secretscotland.wordpress.com/wp-content/uploads/2024/05/experimental-crossing-night-exclamation.jpg)
Points worth noting.
There are two of these flat exclamation mark signs mounted on each pole, facing both traffic flows.
The signs are flat and thin – the closer view may LOOK like a box, but is actually two of these thin flat signs, mounted back to back on the pole, with a space between them.
As noted in the first post, now some time ago, this one has been damaged, although the reason is not obvious (accident or vandalism), and the flashing amber lights are dead,
Prestwick
I mentioned the presence of a similar installation on a roundabout on the Prestwick Airport perimeter road.
Funny thing, it’s just about as hard to be sure the exclamation mark signs are illuminated there as well, but I’m sure they are. It would be difficult, on that much quieter, isolated road, for any headlights to catch the retroreflecting coating at the right angle, and make them look as if they were illuminated.