3 ms·

> Police surveillance, help to solving a kidnapping, finding quickly the position of a car accident... IDK, gps seems a much better fit for those. Well, unless

> Police surveillance, help to solving a kidnapping, finding quickly the position of a car accident... IDK, gps seems a much better fit for those. Well, unless you're stupid enough to record a ransom video within earshot of a singing road I guess... I, for one, would much prefer silent roads. For a while the chirper thing for the crosswalks a block over was turned up way too loud and I had to listen to it all night when I had the windows open because the weather was nice -- even more annoying than a low-battery smoke detector.

pvaldes 9y ago
There is not need to play the BSO of Thelma and Louise. The marks could be spaced enough to reduce the clicks to white noise and not being noticed from the point of a people standing in the street. Is easy to create a binary code with a latitude-longitude reference. You will have quickly: country, state, type of road, Km (and could easily calculate speed and direction also). On the other hand GPS relies in some signal output that maybe could be discovered by a listening device. This could be just passively recorded by a hidden sort of quiescent black-box device (to be recovered later).