*A "lorry" is what they call a truck in England and it's also sometimes what people call me.
The folks down at Transport for London have come up with a very clever little campaign to highlight the very large blind spot that exists for truck drivers.
The demonstration is described as "augmented reality". To use it, you need a webcam and a printout of a marker sheet (which you get from the website) . You hold the marker sheet in front of the webcam. Then a clever computer thing happens where a big truck appears in front of your face with a bevy of bicycles beside it. Along the side of the truck, two statements are displayed; "Undertaking lorries at intersections can be fatal" and "All of these bikes are in the driver's blind spot".
It's really clever and as far as I know unique (although I don't know everything). You find yourself trying to see around the piece of paper that you are holding in front of your face. I guess the idea is this simulates how difficult it is for truck drivers to see cyclists. The metaphor goes something like this; I am the truck driver, the paper is my blind spot, and the computer screen is the cyclists. It's cool!
Give it a try. Go to http://seetheblindspot.tfl.gov.uk/, print out the marker sheet and get blind!