Apr 18, 2012 Atbman commented on A Final Push for the "Slow the Fuck Down on Neighborhood Streets" Bill.
As far as the collision impact is concerned, an increase in the speed from 20 to 30 increases the speed by 50%, but the force of the impact by 125%. Doubling the speed from 20 to 40 increases the speed by 100%, but the force of the impact by 300%.

The figures for 50mph are 150% and 525% respectively.

This non-linear increase in the impact force accounts for the non-linear increase in the death rate as the speed goes up
Apr 18, 2012 Atbman joined My Stranger Face
Apr 18, 2012 Atbman commented on A Final Push for the "Slow the Fuck Down on Neighborhood Streets" Bill.
As far as the collision impact is concerned, an increase in the speed from 20 to 30 increases the speed by 50%, but the force of the impact by 125%. Doubling the speed from 20 to 40 increases the speed by 100%, but the force of the impact by 300%.

the figures for 50mph are 150% and 525% respectively.

This non-linear increase in the impact force accounts for the non-linear increas in the death rate as the speed goes up