Law enforcement: Shortcomings of radar speed measurement: It's based on sound principles, but present systems have practical limitations and may be misused

The accuracy of radar devices as they have been used to enforce speed laws on roads in the United States is being questioned. Well-publicized court rulings - such as last year's State of Florida v. Ana Aguilera ruling - have found radar speed readings inadmissible as legal evidence, because the radars were operated in such a way as to cast doubt on the accuracy of the readings.