While 75 may not be unreasonable for many portions of US-26, it is unreasonable if you're driving fast enough that you don't see the speed traps. Just don't slam on your brakes, coast and shift down instead, the cops don't tend to notice that you're slowing down for their speed trap if you do it fairly gradually.

http://www.chron.com/cs/CDA/printstory.mpl/metropolitan/2745145

Aug. 18, 2004, 8:49PM

Deputy logged Perry speeding on his Harley Trailing security car was stopped; no ticket issued By CLAY ROBISON Copyright 2004 Houston Chronicle Austin Bureau

AUSTIN - Gov. Rick Perry hopped on his Harley-Davidson one July weekend and went on a scenic ride — at speeds estimated up to 75 or 80 mph, according to a constable's account released Wednesday.

A Travis County deputy constable who spotted, but didn't recognize, Perry cruising on scenic, hilly Southwest Parkway on July 3 didn't pursue him to issue a ticket but pulled over a trailing security car instead, which also wasn't ticketed.