Police are allowed to be somewhere for the sole purpose of writing tickets. You don't like it, and I don't like but that is the way it is and it is perfectly legal, so it is completely worthless and a waste of time to even try that as a defense.
Now elements the prosecutor has to prove, by putting officer on the stand and asking questions, are:
- Identify you
- State that you were the driver
- State that you were driving a vehicle as defined in the HTA
- State that you were on a highway as defined in the HTA
- State that you did not come to complete stop at the white marked stop line
What you need to do is bring reasonable doubt to the officers testimony by (1) cross-examining the officer, and/or (2) your testimony and/or witness testimony.
Let's talk about you and your witness testifying first... normally this is bad idea as most people end up incriminating themselves. You do have the right not to testify against yourself, so you are not required to do this. Should you testify? Should your witness testify? If you are willing to say, UNDER OATH, that you "absolutely did stop", then yes you should testify. If your witness is willing to say, UNDER OATH, that you "absolutely did stop", then yes they should testify too. If either of you are wavering a little on whether you stopped or not, then you should not testify. If you are going to say "I think I stopped" or "I beleived I stopped" then this very weak and you should probably not testify. If you say "I am not sure" or "I think" or "I beleive" then this leaves you open on cross examination to questions from the prosecutor like "so it's possible you did not actually stop completely", to which you would have to answer "yes" and you have then just helped their case not yours. So again, you and witness should probably only testify if you are willing to answer a question like "so it's possible you did not actually stop completely?" with "no, I am absolutely certain that I stopped completely". You probably want to throw into your testimony that you always come to a complete stop at stop signs as you are concerned about safety.
Now if you and witness can testify to you absolutely having stopped, then two witnesses versus officers testimony will most likely lead to reasonable doubt and getting the charged dropped. If only one of you testifies though, then you have your testimony versus officers testimony which will most likely lead to officer being believed over you UNLESS you can bring additional reasonable doubt thru cross-examination of officer.
So first of all, if there is more than one officer that is going to testify then they should have given you the notes for these other officers as well. I would immediately make another disclosure request asking for the notes of any other officers involved, and any witness statements. If they do not provide anything then you know it will only be the one officer testifying. There is no point in asking for anything else, other than the officers notes or witness statements as everything else is irrelevant.
Now the notes are a little sparse in my opinion, so this is good news for you. When the officer first takes the stand, the prosecutor will ask a few questions about their notes and officer will ask JP if they can refer to their notes. The notes are supposed to be to refresh the officers memory of the event and one of the questions that the officer has to answer is "do you have independent recollection of the event". If they say NO then you can object to the use of the notes on that grounds and ask for charge to be dropped. If they say YES well now you can cross examine them on their recollection: What color was my car? 4-door or 2-door? Hatchback or wagon? How many passengers? What color was my jacket? How much other traffic was there?
You can also go down the road of with questions like: How many fail to stop tickets did you issue that day? And you have independent recollection of all of them?
You should also listen closely to the officers initial description of what they say they saw and what they say happened. Anything they say that is not in their notes you can cross-examine them on with something like "You said you watched my white 4-door sedan roll thru the stop sign? YES But there is nothing in your notes about it being white or being a 4-door sedan, correct? YES And when I asked you earlier about how many of these tickets you wrote that day you said 20, correct? YES So it is possible that you are mixing my vehicle up with another that day?"
So anyways you have to bring reasonable doubt to what the officer says. You can only do this thru cross-examination questions and (possibly) your testimony and witness testimony.