So you want to fight your speeding or traffic ticket? Here are five strategies that may help you win your case.

1. Challenge the Officer's Subjective Conclusion

In many states, with many tickets, it's possible -- and sometimes even fairly easy -- to challenge the police officer's view of what happened. This is particularly likely in situations where a cop must make a subjective judgment as to whether you violated the law. For example, when an officer gives you a ticket for making an unsafe left, you may argue that your actions were "safe and responsible" considering the prevailing traffic conditions. It will always help your case if you can point to facts that tend to show that the cop was not in a good location to accurately view what happened or was busy doing other tasks -- for example, driving 50 mph in heavy traffic.

In about 20 states, deciding whether it is safe to exceed the speed limit is a circumstance where a subjective judgment must be made. That's because in these states the posted speed limit is not an absolute limit but only creates a legal presumption as to the safe speed for that road. This raises the possibility of challenging the officer's judgment by proving it was safe to slightly exceed the posted limit.

2. Challenge the Officer's Observations

In cases where your state law requires an objective observation by the officer (not a judgment call about whether your action was safe), it often boils down to an argument about whose version of the facts is correct.. For instance, if you were cited for failing to come to a stop at a red light or for making a prohibited turn, who wins the case will depend on who the judge believes. Unfortunately, the guy wearing the badge usually wins, unless you can cast real doubt on his ability to accurately perceive what happened. However, there are a number of techniques that may work to raise at least a reasonable doubt as to your guilt.

Here are the types of evidence most likely to help you convince the judge that you -- not the officer -- are in the right:

• Statements of witnesses, such as passengers or bystanders, who testify to your version of events.
• A clear, easy-to-understand diagram showing where your vehicle and the officer's vehicle were in relation to key locations and objects, such as an intersection, traffic signal, or other vehicle. Diagrams are especially important for tickets given at intersections, such as right-of-way, traffic light, or stop sign violations.
• Photographs of intersections, stop signs, and road conditions. These can be used to show conditions like obscured stop signs or other physical evidence that backs up your case.
• Any other evidence that would cast doubt on the officer's ability to accurately observe your alleged violation. A classic way to do this is to prove his view was obscured -- or that his angle of observation made it impossible to accurately see what happened.

3. Prove Your Conduct Was a "Mistake of Fact"

Judges are allowed some leeway in considering circumstances beyond your control. If you can show that you made an honest and reasonable error, a judge might find you made a "mistake of fact," meaning your ticket should be dismissed.

Here are several examples:

• You failed to stop before coming to the pedestrian crosswalk markers because they were old and faded and could not be clearly seen.
• You failed to stop at a stop sign after a major storm because the sign was hidden by a broken branch. If possible, you should take pictures of the obscured sign and show them to the judge to support your argument.

Often this argument comes down to your claim that you weren't given fair notice as to the conduct that was expected of you. For example, a judge might dismiss a ticket for running a stop sign if it was brand new. However, the judge would probably not buy this defense if:

• the sign had been up for more than a few weeks
• you had never stopped at that intersection before (and therefore shouldn't have been fooled by its sudden presence), or
• you were speeding.

4. Prove Your Conduct Was "Legally Justified"

You may also successfully argue that your actions were "legally justified" considering the circumstances of your alleged violation. For example, if you were charged with driving too slowly in the left lane, it is a legal defense in all states that you had to slow down to make a lawful left turn. In this situation you do not have to deny that you were driving significantly below the speed limit and causing vehicles behind you to slow down, but you can offer the additional fact that legally justifies your otherwise unlawful action. Such defenses can be very successful because they raise an additional fact or legal point, rather than simply contradicting the officer's testimony.