AUGUSTA, Maine — If you drive along Interstate 95 in the nation's far northeastern corner, "it's trees, trees, trees" for mile after mile, says one motorist. So why not set the cruise control on 75 mph? That's what a lot of drivers have been doing for years, but now it's legal on one lonesome stretch, making Maine the only state east of the Mississippi River where drivers aren't breaking the law by driving 75 mph. The new law authorizing the higher limit went on the books Wednesday, though it actually takes effect when new signs replace the old 65 mph...