[Scan-DC] D.C. area RADAR detection

[Alan Henney]

----- Original Message ----- 
To: Alan Henney
Sent: Wednesday, January 16, 2013 5:14 AM
Subject: Re: [Scan-DC] D.C. area RADAR detection


Here is a link which explains the different types of speed camera 
technology.

http://www.autoevolution.com/news/how-speed-cameras-work-18060.html

----- Original Message ----- 
To: Alan Henney
Sent: Wednesday, January 16, 2013 10:10 AM
Subject: RE: [Scan-DC] D.C. area RADAR detection


Here's a table of the technologies in use. If you publish this on the list
would you please delete my name?

Montgomery County speed cameras on two-lane country roads - tall "stalk"
with head - K band radar, single vehicle detection, limited detection range
and lots of false alerts on your radar detector. A GPS would be a good way
to be warned of these.

Montgomery County laser speed cameras - small shiny aluminum box much like a
newspaper box - laser, multiple vehicle detection and ticketing, shoots from
"behind," little warning. These are moved around the Silver
Spring/Bethesda/Rockville area frequently, and they are permanently mounted
in some locations such as Chevy Chase/Conn. Ave and Montgomery Village
Avenue.

New Montgomery County threat - radar based red light/speed cameras, as used
at the intersection of 193 and US 29 - small white "squares" on traffic
signals - usually red light but in school zones also functions as a speed
camera.

Maryland highways, work zones - white SUV with detection apparatus on front,
or smaller white vehicle with separate detection apparatus - laser, multiple
vehicle detection and ticketing, shoots from "behind," little warning, can
give false tickets.

Prince George's - Trailer with mast using multiple lasers - multiple vehicle
detection and ticketing, laser does not set off many detectors or
countermeasures. A single trailer can cover multiple lanes going in one
direction or two lanes going in opposite directions. Escort *claims* their
latest detectors will detect these, however without countermeasures the
alert may not occur soon enough to be useful.

DC - I haven't been traveling in DC lately; in the past I've found both
laser and K/Ku band radar for their cams.

Montgomery County and State of MD lasers are vulnerable to countermeasures.
The PG County systems aren't yet. *However* the PG County systems use a mesh
network so theoretically you could detect them. The PG systems I've seen are
used in fixed locations so a GPS could give good warning. DC lasers should
be vulnerable to countermeasures.

May you drive skillfully,