[jyl]

They must have front and rear photos. The ticket has a picture of the driver from the front (non-recognizeable silhouette) and they have my license plate number which is only visible from the rear.

My coworker moved here from Boston, he's one of those aggressive Boston drivers, and has gotten 4 tickets in 18 months. He tells me there is no effective way to fight photoradar tix in Portland. He also says there is no equivalent of California's "going to traffic school". I'll have to look into that. Bummer to have a 10 year clean record befouled.

I just searched for gadgets to foil photo radar. Appears that the reflective clean paint sprays are useless. The license plate covers which prevent viewing the plate except from straight behind do work, but also get you pulled over.

So here's my idea. Mount a photographer's optically triggered slave flash by the license plate. If the photo radar camera uses a flash, it might trigger the slave flash, which might wash out the image of the plate. It might also be noticeable to the person operating the photo radar machine, but they may not be police officers (I think Portland uses a private contractor, which is very common) and may not be inspired/able to pursue (in their photo radar van). Of course, the photo radar system might not use a flash in broad daylight, so this might only work from dusk to dawn.

I recall that optical slave flashes are pretty cheap and can be quite compact.

Come to think of it, I imagine this concept could be applied to make a DIY anti-LIDAR device. In fact, they make commercial products like this. Anyone know what wavelength the police laser speed detectors use? Are they red lasers?