[QUOTE]Originally posted by RED MX5

 

The legality of POP has not yet been challenged here (as far as know), but the current generation POP units are highly questionable due to their single measurement. Older units require two consecutive, identical, readings to achieve lock, which insures accuracy. The current POP units use a single pulse and this can cause false readings; hence a POP ticket should be easy to challenge, but somebody is going to have to spend the time doing it to set a precedent. Second generation POP units will use multiple pulses and have higher accuracy, but they will never be as much of a threat as the optical units. So far the only optical units I've seen are stationary, but moving optical speed measurement is right around the corner.

What really bugs me is that the cameras TRW put along Georgia's Interstates all have the capability to read vehicle speeds. So far they haven't been using them to pass out tickets, but it is just a matter of time.

RED

 

Cameras, YUCK.

 

1. What if the cop was deep into the right shoulder of the highway and you're driving in the left lane of a 5 lane highway (10 lanes both sides). As you get closer to where the cop is situated, I believe the cop will get inaccurate speed readings. The indicated reading would approach 0 mph when you are exactly perpendicular to the cop (since there would be no relative speed differences at that angle) and then as you move away again, the radar can once again pick up more accurate readings. Is this correct? But perhaps, the radar can compensate for this?

2. How would you know the cop used POP radar to even challenge it?

 

Your number 1 statement is true, but honestly no cop is stupid enough to take a reading at these positions/angles especially when he is exactly next to you when you guys are traveling in opposite directions. You have to remember cops are not dummies, they don't just 1) point 2) shoot 3)write tickets if the number is greater than legal speed limit ... Well, maybe they do, but they still do have some training regarding the use of the radar units they use.

 

I guess you're right - even if the reading produced is at an oblique angle, the reading would always be <= to your true speed so always works to the motorists' favor assuming the radar is calibrated correctly. Anyone know the answer to #2?

 

[QUOTE]Originally posted by SiDriver
I guess you're right - even if the reading produced is at an oblique angle, the reading would always be <= to your true speed so always works to the motorists' favor assuming the radar is calibrated correctly.

 

that's how i got my first ticket, the cop on his bike got me while driving the opposite direction. i learned my lesson alright .