I told you your argument. It is unreasonable to ask you to cut your speed in half in 50 feet. The video provides your case (I can tell that many posters didn't bother to actually look at it). This is why the cop said you passed several 20mph signs when clearly you didn't. So, get him to court, ask him the questions (I'd be more then happy to give you the list) and then present your video and case. I've seen many, you have a good one and I'm not one to say that lightly.
In order of appearance:
- Reduced speed ahead sign
- Police officer and 20 MPH speed limit sign to the left of the bus
- Police officer and 20 MPH speed limit sign to the right of the bus