Please cite that tidbit. I've stopped short of plenty of DUI/"Safety" road blocks, and made a legal U-turn, or just by-passed them with other road connections, purely to avoid them, and have not been arrested, or pulled over, or harassed for doing such... Yet. And I've kinda assumed it was legal to avoid road-blocks, since I've read somewhere else on the forums [I think it was the General Discussion area] that a U.S. District court said its not illegal to avoid them; So, I took it to apply to Kentucky via the full faith and credit clause of the 4th Amendment.
*I've been googling it, and I can't find the exact case for it, but there is reference to a 1990 SCOTUS case involving the Michigan State Police, where it is found constitutional, but at the same time unconstitutional and acceptable.
**For better reading, I found this website article to be very informative, and responsive, critical and helpful, with a Constitutional/Liberty minded approach in most aspects.
http://www.motorists.org/dui/roadblock
***I cannot find the district court case, and have not bothered to read the SCOTUS case, so research on your own and consult an attorney on your own dime to find out for yourself, but generally speaking from experiance, if you're not drunk, and not committing a crime, then you have nothing to worry about in make a LEGAL U-turn, or using side-roads, while avoiding a roadblock. And lets call it what it is, a ROADBLOCK, not a 'checkpoint', because you are being detained when stopped, and do not have freedom of movement.
Some other interesting things being, the cops have to stop ALL vehicles at a roadblock, OR pick every third, or fourth, vehicles to stop, and let others pass by. Any deviation of that plan, which has to be announced beforehand publicly, is considered illegal.
Furthermore, with our right to arms, and the fact that it isn't illegal to have a firearm, loaded or unloaded, in clear and open and plain view; I'd tell a cop to p*ss-off if they made a comment or tried to take my gun. They can take it, sure, but I'll make them squeal like a piggy when my lawyer sues them for all they're worth.