Fla. Admin. Code Ann. R. 15B-2.0101 - Tests to Determine Speed Accuracy of Average Speed Calculators
Tests to determine the accuracy of Average Speed Calculators shall be performed as follows:
(1)
This subsection only pertains to ground vehicles which are inputting the
distance used for speed measurement by use of the ASC distance measuring
feature (if so equipped):
(a) A distance of
1/2 mile (2, 640 feet) or alternatively 1/4 mile (1, 320 feet) shall be
measured, and each end of the distance marked so that it may be clearly
identified from a moving vehicle or aircraft in either direction.
(b) Vertical lines may be placed on left and
right front door windows of the speed computer equipped vehicle, or the
operator may use door lock knobs or other convenient visual reference points on
his/her car.
(c) The operator will
drive through the measured course with both switches turned "on" when lined up
with the reference point at the beginning of the course, and turned "off" when
similarly lined up at the end of the course. Operator pushes the distance
recall button if so equipped, and reads displayed distance in the speed timing
unit. If this distance is within the acceptable tolerance of 1/2 of 1%, the
unit is in calibration.
Example: On a quarter of a mile course (0.2500) the reading should be between 0.2512 and 0.2488.
(d) Should the error be greater than 1/2 of
1% the operator should recalibrate his unit in accordance with the
manufacturer's instructions and repeat the procedure as outlined in subsection
(3).
(2) A distance of
1/2 mile (2, 640 feet) should be input either by measurement or operator input.
The method of input shall be consistent with the method to be used during the
speed measurement. For example, if the distance at the enforcement site will
use a distance measured with the ASC, then this calibration should be performed
in a similar fashion. The timing device should be allowed to run for 30
seconds. A speed of 60 mph should be displayed. The test should be repeated
with a time input of 20 seconds. A speed of 90 mph should be displayed. The
speed displayed must be within +/- 2 mph for the unit to be considered
accurate.
(3) As an alternative to
subsection (2) above, a distance of 1/4 mile (1, 320 feet) may be used. The
distance should be input either by measurement or operator input. The method of
input shall be consistent with the method to be used during the speed
measurement. For example, if the distance at the enforcement site will use a
distance measured with the ASC, then this calibration should be performed in a
similar fashion. The timing device should be allowed to run for 15 seconds. A
speed of 60 mph should be displayed. The test should be repeated with a time
input of 10 seconds. A speed of 90 mph should be displayed. The speed displayed
must be within +/- of 2 mph for the unit to be considered accurate.
(4) Verification of calibration must be
checked each day before any enforcement activity with the device. The results
of the verification test shall be recorded and retained for further
reference.
(5) If so equipped, an
internal time base will be checked the same as a stop watch under Rule
15B-2.012,
F.A.C.
Notes
Rulemaking Authority 316.1905, 321.02 FS. Law Implemented 316.1905(3)(a) FS.
New 6-15-82, Formerly 15B-2.101, Amended 10-18-94, 5-23-04.
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