TexasCHLforum.com

Wow, that's an eye-opener as to how they set the speed limit, both with the lone TexDOT driver,
and the 125 driver version.

I had read previously that when traffic engineers are trying to set a speed limit on an established roadway
that already has traffic on it they:

* set up hidden radar guns tuned to a frequency which is outside of a radar detector's normal cop frequencies
(so as not to skew the results from drivers with detectors)

* they set the speed limit to what the 85th percentile of drivers observes.

But if the average speed was say, 64 MPH, they might round down to 60, instead of up to 65.

Roadways have "design" limits that indicate what the speed limit should be, but other factors count too.

SIA

http://news.blogs.cnn.com/2012/09/07/yo ... ?hpt=hp_t3

The 85 MPH speed limit recently OK'd on toll road SH130 will be the highest allowed speed limit in the US,
and will match I-15 in Utah & I-10 and I-20 in West Texas.

The new speed limit will go into effect on or before November 11, 2012.

SIA