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Explanation
A patrol car is travelling in front of you with
a radar source aimed forward. Because
signals are sometimes reflected off of large
objects and sometimes not, the alerts may
seem inconsistent.
A patrol car is approaching from the other
direction, sampling traffic with instant-on
radar. Such alerts should be taken seriously.
You are driving through an area populated
with radar motion sensors (door openers,
burglar alarms, etc.). Since these transmit-
ters are usually contained inside buildings or
aimed toward OR away from you, they are
typically not as strong or lasting as a real
radar encounter.
CAUTION: Since the characteris-
tics of these alerts may be similar to
some of the preceding examples,
over-confidence in an unfamiliar
area can be dangerous. Likewise, if
an alert in a commonly traveled
area is suddenly stronger or on a
different band than usual, speed
radar may be set up nearby.
Alert
PASSPORT alerts intermittently. Rate and
strength of alerts may be consistent or vary
wildly.
PASSPORT alerts intermittently. Rate and
st re ng th o f s ig na l i ncr ea se s w it h ea ch a ler t .
PASSPORT gives an X-band alert
intermittently.