electronic devices such as radio-microwave devices, commonly
referred to as electronic speed meters or radar, may be used
only as part of an automated speed enforcement system or by
members of the Pennsylvania State Police.] Electronic devices
such as radio-microwave devices, commonly referred to as
electronic speed meters or radar, may be used only as part of
an automated speed enforcement system or by any police
officer.
(3) Electronic devices which calculate speed by
measuring elapsed time between measured road surface points
by using two sensors and devices which measure and calculate
the average speed of a vehicle between any two points may be
used by any police officer.
(4) [No person may be convicted upon evidence obtained
through the use of devices authorized by paragraphs (2) and
(3) unless the speed recorded is six or more miles per hour
in excess of the legal speed limit. Furthermore, no person
may be convicted upon evidence obtained through the use of
devices authorized by paragraph (3) in an area where the
legal speed limit is less than 55 miles per hour if the speed
recorded is less than ten miles per hour in excess of the
legal speed limit. This paragraph shall not apply to evidence
obtained through the use of devices authorized by paragraph
(2) or (3) within a school zone or an active work zone.] A
person may not be convicted upon evidence obtained through
the use of devices authorized by paragraphs (1), (2), (3) and
(5) unless the speed recorded is more than ten miles per hour
in excess of the legal speed limit on a highway or six or
more miles per hour in excess of the legal speed limit on an
interstate highway or freeway with a posted speed limit of 70
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