as far as the LEO writing the ticket, I asked my next door neighbor who was a chief of police in a NJ town what constituted an adequate stop for a stop sign. the response I got was that the LEO should write the ticket if he/she felt the stop was not adequate and they would get backed by the office and they could fight it out in court.
I think if a LEO saw a combination that seemed to exceed the standards but couldn't weigh the vehicles on the spot, etc. that a ticket could be written.
and since stopping distance will vary drastically dependent on road surface, the standard seems to me to be unenforceable due to ambiguity.
bumpy