So the question is..... will a laser detector help
prevent you from getting a speeding ticket from a Mobile Safety
There are quite a few circumstances that can occur
out there. Lets look at a few of the more common ways Laser
The Safety Camera Van and where you place a laser
Sitting almost anywhere they want on the highway these safety
camera vans use much the same type of equipment, Laser Gun,
Video Camera, Video Recorder and Printer. The effective range
of the safety camera vans is the effective range of the laser
gun, some can work a mile away. The effective range of the camera
is often much less. 100-500m for number plate recognition.
Most camera vans work quite close to the vehicle in question
and this gives a bit of a problem to high mounted laser detectors.
Camera van operators also read sites like this to get the edge
on drivers. Several police forces are now aware that if they
keep the laser sight, (Cross hairs or sight dot), low down on
the front of the car, number plate or below, a windscreen mounted
laser detector will not see the laser light and will therefore
not trigger an alert.
You may recall that in the laser jammer section of this site
I tell you to mount the laser jammer low down near the number
plate. The same is to be said for laser detectors, place them
in a position that the police target, the number plate area.
In an ideal world you would have a laser sensor in the front
and back window of the vehicle and a laser sensor by the front
and rear number plate. This would give the best coverage.
Several companies do laser sensors that are built into their
main units, this is fine for the window coverage but not so
good for number plate. Some also do separate laser sensors that
are weather proof and can be fitted by the number plate. Check
with your chosen company to see what they offer.
So the best place for a laser sensor is both the window
and the number plate and they should cover both ends of the
The Safety Camera Van and what warning you can expect.
The are lots of scenarios I will cover just a few of
the more common ones.
Example 1, Driving from a 60mph to a 40mph. Sometimes
the police will target you in the 60mph and follow you in to
the 40mph, hoping you don't slow down quick enough. In this
case you should get a warning that gives you enough time to
slow. You should get away with it and long as you were not over
Effective Laser sensor position - By number plate
Example 2, Safety camera van round bend or over the
other side of a brow and you are the first car. You could get a warning but in this case the most likely
outcome is that you will be caught before you can react in time.
Effective Laser sensor position - Not much would help.
Example 3, Safety camera van round bend or over the
other side of a brow and you are the second car. You could get a warning and might have time to react as
they target the car in front.
Effective Laser sensor position - Windscreen
Get the idea, if used in the
right way a laser detector can help.
The Laser Beam
Laser guns have a tight beam, so if they
target you close and low you window mounted laser sensor may
be of no use. Below is an image showing the kind of pattern
a leaser beam will have.
To have the most warning you need both
a windscreen mounted sensor and a Bumper mounted sensor
It is very common to drive
towards a camera van and get no warning at all and this could
1, You are not speeding
2, They have targeted you low down and your sensor has not seen
the laser beam
3, He is targeting another car
4, He is doing something else.
5, He is not targeting your lane