4 ms·
If you're talking about the ones I think you are, those are preemption signal devices [0] for emergency vehicles. [0]: https://ops.fhwa.dot.gov/publications/fh
by mh- 1y ago
If you're talking about the ones I think you are, those are preemption signal devices [0] for emergency vehicles.
[0]: https://ops.fhwa.dot.gov/publications/fhwahop08024/chapter9.htm https://ops.fhwa.dot.gov/publications/fhwahop08024/chapter9....
- itsmartapuntocm 1y agoNo these aren’t optical sensors like those, they’re full blown cameras. Cobb County at least on their website says they use camera sensors as well as buried induction loops.