Who has right of way at an intersection with two stop signs across from each other? The traffic on the main road (with no stop signs) of course has first right of way. Suppose two cars are across from each other turning onto the main road. One is turning right and one is turning left (to both ultimately go the same direction). Who has right of way? Is it the person turning right? Is it the person who got to the stop sign first? Does the answer change if there's a whole line of people turning right from one side and a whole line of people turning left from the other side? I'm looking for the general rule in the United States. If the state matters, I'm in Ohio.
The NHTSA gives rules for the United States. Right of way goes to the first person to stop. So if a line of cars were at both stop signs, and all cars wanted to make the same conflicting turns, they would alternate. If the opposing cars stop at the same time then the one turning right has the right of way. (This is because a right turn falls under the "Straight Traffic Goes First" rule.)
Damaging someone else's property is not protected free speech in the US. Nor is using someone else's property without permission and against the owner's wishes. Scenario 3 would surely be vandalism or &quot;Malicious Mischief&quot; or some similar offense, even if the paint can be fairly easily removed. The same would be petty surely true of scenario 2, as it would take at least some effort to remove the sticker, and it could be a safety hazard until it is removed (obstructed vision). Scenario 1 would probably not be even a minor crime, unless perhaps the person trespassed to attach the string. But the person has no right to insist that the car's owner not remove the sign. I am assuming that the car is owned by someone else, and the the person placing the sign, sticker or paint acted without permission from the owner or any authorized person.
The Ct. driver's manual p. 44 says that "Solid yellow lines may be crossed to make a left turn to or from an alley, private road, driveway, or street", and also "A double solid white line prohibits lane changing" (turning left is not the same as lane changing). In Washington, there is a fine of $136 for crossing a double white line, but this is related to the hyper-limited access pay lanes on the freeway. I have not found anything in the Connecticut code that indicates an analogous absolute prohibition against crossing a double white. In lieu of a statutory prohibition, you may succeed in arguing that it was a legal turn, as long as the turn was in compliance with the rest of the law, e.g. you signalled, you yielded right of way (which essentially means he was driving so fast that he appeared after you started to turn). His speed may be contributing negligence that prevents you from being liable, so it just depends.
While you have correctly stated the usual order of events in a trial, the judge has wide discretion to modify the order if it seems that justice will be served. Even in a serious criminal case, the judge can reopen testimony after closing arguments have started if the judge finds that there is good reason to do so. Traffic cases are generally less formal, and the judge will more freely modify procedure to bring out the facts of the case. I have often seen judges at traffic court ask significant relevant questions, and if they are in fact relevant, i don't think you will get far objecting to their begin asked. I am not a lawyewr, but I also have observed several traffic cases in Maryland and in NJ.
In the United States, the U.S. Department of Transportation, by regulation sets uniform design and signage standards for federally funded highways, which most U.S. state and local governments incorporate, either by restating them or incorporating them by reference for non-federally funded roads. I imagine that most other countries have similar regulations. Nonetheless, this is extremely unlikely to prevail as a defense to the traffic violation of speeding which is usually a strict liability offense to which almost no affirmative defenses, excuses, or justifications may be considered.
I have beaten all but one of my traffic tickets just by going to court. In one case, the judge threw out the charge because he couldn't read the officer's handwriting on the ticket. In another, the officer charged that I was parked in a "no parking" zone on a particular street (at night), but gave a cross street where parking was, in fact, allowed.
The principle of constitutional law is that in order to arrest you, the officer would need probable cause. Certain acts are in themselves violations of the order (being closer to another person that 6 feet, illegal sneezing). Walking in public does not per se constitute a violation. In order to briefly stop a person walking on the street (a "Terry stop"), the officer needs a reasonable suspicion that the person is in violation of the law. That means there has to be a reason, and a gut feeling does not count. An officer would not (legally) be able to stop every person they see walking down the street / driving, and demand an explanation of where they are going. If a person is just aimlessly wandering down the strees with friends (even if they are sufficiently separated), that could suffice to justify a stop, given the limited legal excuses for being outside your home.
While local law varies, most jurisdictions do not authorize citizens' arrests for traffic violations. Generally, citizens arrests are authorized only for misdemeanors and felonies outside the traffic code. Indeed, there are many traffic offenses for which law enforcement is authorized only to stop a violator and issue a ticket, but not even law enforcement is authorized to actually arrest someone. And there is no such thing as a citizen's citation or ticket. Citizens arrests also usually require that the citizen witnessed the crime in progress, but that requirement would be met in this case. If the case had been a hit and run, however, a citizens' arrest probably would have been legally authorized, although the wiser course of action would still be to call the police and to follow the offender at a safe distance.