Montana has reestablished speed limits as of 1999
http://www.doj.state.mt.us/driving/drivingsafety.asp
and some interesting info about Montana highway fatality rates before, during, and after the reasonable and prudent speed limit laws
http://www.motorists.com/pressreleases/montana.html
Colorado just passed a law requiring people to drive only in the right lane unless they are passing. Of course in Denver or Colorado Springs that doesn't work since there is too much traffic, and the people in the rest of the state generally seem to do this already.