Since the laser is pointed down towards the ground, it should be much safer. Also, if the laser is a class I (1) or II (2) it could be safe for viewing. However, long periods of class 2 laser viewing is not a good idea.
Or, how about an intense green LED projector system?
This is really interesting, It would be good if it could be projected based on distance of near objects and stopping speed cyclist.
They could rule it as a distraction to drivers, like they do neon/led light kits under cars.
Great idea but has it been tested for children or animals looking into the laser when they walk out in front of the cyclist (lets face it you know it will happen) there are so many rules when it comes to lasers and the public. Hope it does come out though.
I like the idea of a continuous strobe for all smaller vehicles. In most of the motorcycle accidents in the US, the car driver almost always says they did not see or notice the motorcycle or bicycle. Green light would have the advantage of being near the normal peak eye response to light and flashing it on and off would attract attention at least here in the US where most green lights are on or off signalling things are ok to go.
If she used a wheel generator to power the device it might have a better chance of being on when needed. Batteries are notorious for not being charged when you need them.
I wish her luck, this idea could well save a lot of lives around the world.