Some factors that make radar an often unreliable measurer of vehicle speed are inadequate calibration and maintenance procedures, its inability to distinguish a particular target, and interference that creates false signals. Moving radar, compared to stationary radar, has even more possibilities for a false reading. The adequacy of officer training for the use and interpretation of radar readings is also a factor. The booklet advises that drivers can avoid being stopped by a radar officer by not exceeding the speed limit when traveling on a relatively deserted highway and by not traveling at a speed significantly over that of other vehicles when traveling on a crowded highway. The booklet presents the test results of the six radar units most commonly used by the police, a list of the best radar detectors, advice on how to locate speedtraps throughout the United States, directions for jamming police radar, and information on whether speeding tickets received out of one's home State will be pursued by the issuing State. 9 references.