Air radar

Cunnos

Yea my "friend" is weighing his options, but he said he will appeal it and hopefully get his 362 dollar ticket reduced. My friend is also interested in finding out if the radar is actually a video or just a tagged picture.

Hambone1

I know in WA state on some of the more open parts of I-90 (major highway) there are aircraft patrols which consist of light planes being flown overhead of the highway. They run what is essentially a dash cam like in a squad car, and use a combination of radar/laser within a certain range, and also the previously mentioned hash marks

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Cunnos

hmmm interesting, what exactly is a hash mark though? As my friend was saying, its one thing if a cop gets you on the side of the road with a radar gun or you drive by them going to fast, but how accurate can a helicopter or airplane be? Thats what my friend is trying to figure out

ChrisSlicks

If they used the hash marks on the highway then they were using a stop watch and a lookup chart, not radar. There are air to ground radar systems but they are very expensive so not sure how prevalent they are outside of the military.

Either way, if you appeal you are entitled to discovery. File a motion with the court for the state's evidence, if they fail to produce the evidence then it is likely that your case will be dismissed. The evidence will allow you to do additional research into the potential accuracy of the speed measurement, and allow you to challenge on certain grounds.

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Cunnos

Yes, this is what my friend intends to do. He said that he wants proof or evidence from the air radar that he was indeed going the speed they clocked him at. The hash marks/stop watch method could prove to me a tough thing to argue, but if it was indeed an air radar then proof should be available.

ChrisSlicks

The stop watch method is subject to human error, but the error has to be significant to throw it off. At 60 mph you are covering a 1/4 mile every 15 seconds, at 90 mph you'll do it in 10. They might be off by 0.1 to 0.3 seconds due to parallax error or reflexes.

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Cunnos

Interesting stuff, thank you for the info. I think my friend is going to appeal it and ask the troopers for evidence of his clocked rate of speed.

m4a1mustang

Those lines going across the road on the highway... The airborne officers will time you from line one to line two, then divide that distance by your time, arriving at your average speed between two points. If the points are 1/2 mile apart and it takes you 24 seconds to go from line one to two, you're doing about 75 mph...

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