BikesAlive - Occupy Kings Cross - 23 January

How many cyclist/motorist collisions are caused by excess speed?

i.e. is reducing that the most effective way of reducing said collisions?

I would contend that speeding is a bad thing. I would like it to become socially unacceptable, as what happened to driving without seatbelts during the 80s.

30 mph collisions with peds kill 80%, 20mph kill 20%. An advert told me.