Oh, you're sure? Then I guess that settles that...

...not.

<http://casr.adelaide.edu.au/speed/lit.html>

"Six hundred miles of main rural highway were included in the study, 35
sections in 11 states. The sections were reported to have been
representative of main rural highways in the United States: three
quarters were two-lane highways, with the remainder being four-lane
divided highways; the average section length was 17 miles, although one
section was 91 miles long; a daytime speed limit of 55 to 70 mph applied
to 28 sections, 45 mph to two sections, and subjective limits (relying
on drivers' judgements) to the remainder...

...Solomon found that the daytime involvement rates took the form of a
U-shaped curve, being greatest for vehicles with speeds of 22 mph or
less (43,238 per 100 mvm), decreasing to a low at about 65 mph (84 per
100 mvm), then increasing somewhat for speeds above this (reaching 139
per 100 mvm for speeds of at least 73 mph)"

Notice that the slowest drivers were by *far* the most dangerous.

There are other references if you'd like.

But you should definitely read this next one. It's written by the the
"hief of the Traffic Safety Research Division of the Federal Highway
Administration", so you can't really discount it.

<http://www.ibiblio.org/rdu/sl-irre0.html>

You should especially read this bit:

"However, the findings to date suggest that, on the average, current
speed limits are set too low to be accepted as reasonable by the vast
majority of drivers. Only about 1 in 10 speed zones has better than
50-percent compliance. The posted speeds make technical violators out of
motorists driving at reasonable and safe speeds.

For the traffic law system to minimize accident risk, then speed limits
need to be properly set to define maximum safe speed. Our studies show
that most speed zones are posted 8 to 12 mph below the prevailing travel
speed and 15 mph or more below the maximum safe speed. Increasing speed
limits to more realistic levels will not result in higher speeds but
would increase voluntary compliance and target enforcement at the
occasional violator and high-risk driver."

Get that:

"The posted speeds make technical violators out of motorists driving at
reasonable and safe speeds."

"Our studies show that most speed zones are posted 8 to 12 mph below the
prevailing travel speed and 15 mph or more below the maximum safe speed."

"Increasing speed limits to more realistic levels will not result in
higher speeds..."