The motorcycles that travel at a high rate of speed on Tiburon Boulevard, especially between Trestle Glen and the freeway, is becoming an increasingly severe problem in this bucolic community.  Often, our sleep and repose are destroyed by the loud noise.  Indeed, the noise emitted by these motorcycles frequently exceeds the maximum decibel-level permitted under California law.  Why is our police force lethargic about taking appropriate measures against these folks who insist on eroding the tranquility of our community?