
Quoting
adam_
Any shred of data to support your statement that visually estimating headlight speeds in total darkness is 'fairly simple'?
If I was interested, I bet I could find publications on this issue. But I'm not the one that got the ticket.
Your suggestion implies that "visual estimates" which would have occurred at 10pm, or there about, are "questionable"... Can you post a case law citation, a code section/statute (not just any "publication") supporting that claim???
If you think you can, find it, post it, and advise the OP to use it in court and hopefully he/she will come back and report how well it worked out for him/her. Until then, my opinion as to the validity of such an argument will remain the same:
The legal requirement AND the burden that the officer must meet is that he/she is P.O.S.T certified. A certification that includes, but is not limited to, the ability to visually estimate a vehicle's speed to within a +/-5mph margin of error.
Whether that particular aspect of training/testing/certification is conducted at 10pm, at 3am or at high noon, is hardly a point of contention UNLESS such certification includes a restriction stating that it is ONLY valid and applicable during daylight hours. As far as I know, it DOESN'T!!!