madroaduser wrote:
I think that this sort of scenario could actually be an ideal place for a VAS warning about the junction. Installing a camera would simply make people take their eyes off the road ahead and stare at their speedo especially as, in the scenario you describe, the limit falls from 60 to 40.
But the VAS distracts just the same as the scamera. I've been thinking about this and I think the problem is that the VAS dictates when you should look at it by flashing up and diverting your attention at what might well be the worst possible moment to look away from the road ahead.
With a conventional road sign you look at it when the moment is right
for you, typically during a routine planned scan of the roadside furniture. This might take less than a second, with a further scan a few moments later if you didn't pick up all the info you needed the first time. Either way, this is all part of the process of spreading your attention around all the things you need to watch, a process which we optimise over our driving career.
Imagine the alternate possible scenario: we perform our "routine scan" of the roadside, then just as we are about to re-focus on the road ahead the VAS blinks into life alongside us. So we continue to look away from the road as we are distracted into looking at this. We then read it saying "SLOW DOWN!" and think "Hey, am I speeding - didn't think I was?" so the next point of focus is our speedo for a quick check. Sooner or later we might get round to looking at the road ahead again...
Is this good for safety? I don't think so.
Quote:
What could be even better is to, say have a standard warning sign about the junction and then an electronic one which flashes up a warning with something like "Car turning onto road" when a car actually does that or waits at a stop line on the side road.
Nice theory on the face of it, but all you'd end up with is an attitude of "all clear, keep my foot down" from the locals when it doesn't flash up. Which would be a bit of a problem on the inevitable occasion when it has broken and
should have been telling you that a car was emerging into your path...
No, all told I don't think there's much wrong with the plain old informational sign, we just need a whole lot less of them "crying wolf" than we have at the moment.