[leohutson]

This is a completely irrational way to look at it.

The risk of a pedestrian fatality posed by a collision with a car travelling 30kmh is closer to the risk from a car going 5kmh than that of a car going 50kmh.

Look at the chart here:

http://www.victoriawalks.org.au/safe_speed/

The risk from speed is non-linear.

Risk the pedestrians in speed zone greater than 30kmh, because risk of fatal injury is far lower.

[JoeAltmaier]

Don't know many bikes in my community that go 5mph. They're going 20, commuting miles to work.

Anyway, the pedestrians don't risk either now. So saying "Folks should be comfortable adding a reasonable risk of death, since it could be far worse!" is not compelling.