I'd also make the argument that safer speeds are good
for all users (especially if some of them are illegally texting
or using cell phones!). Here's part of an email I sent:
As Tom Vanderbilt wrote recently in the New York Times,
the US has fallen behind Europe and Canada in road safety
engineering, leading to "nothing short of a public
health crisis."
http://roomfordebate.blogs.nytimes.com/2010/05/27/do-we-tolerate-too-many-traffic-deaths/
Unfortunately thousands of drivers routinely exceed the
posted speed limit on Nickerson St by more than 10 mph, and
Seattle Police Department shows many incidents. These
cause delays for all users of the street, including
industrial
traffic. The reconfiguration will
help
traffic
flow more smoothly at safer speeds, and will not reduce
capacity.