First, IANAL, this emphatically is not legal advice, but discussion by a layman who thinks he knows what he’s talking about, etc. You know the drill on how to protect yourself legally, and it’s not taking the advice of some Yahoo like me from a Internet message board. 
But I’ve got two comments. First, what Indiana state statutes and case law have to say about it is almost definitely governing. I’d check the state DOT’s and attorney general’s websites for further information on your rights.
Second, from my (casual) reading there actually is a small body of case law where people took municipalities to court over this sort of thing. And if I may be permitted a bit of generalization, they seem to boil down to resolving two “reasonable man” questions:
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Could you have been reasonably expected to have been aware of the existence of the pothole and taken evasive action to avoid the damage?
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Could the city be reasonably expected to be aware of the existence of the pothole and to have been negligent in fixing it?
A third question would be, Are the damages being sought reasonable and directly related to the damage from the pothole?
In short, if a pothole 500 feet from your driveway on your daily way to/from your home has been there for three months, you could have avoided it by moving left 18 inches without endangering yourself or others, and you hit it anyway, you have nobody but yourself to blame.
If a pothole appears overnight owing to the freeze/thaw cycle, the city is not obliged to have fixed it by the next morning – they deserve a chance to get reasonable notice. If it can be shown that (a) they have been notified of the potchole, or (b) the pothole has been there long enough that they got “constructive notice” – i.e., a diligent reasonable city D.P.W. should have been aware of its existence by its duty of due care in street maintenance – then they are responsible.
But for damages to your vehicle directly related to hitting the pothole, not for whatever the traffic will bear. If your car has 80,000 miles of wear on its springs and struts, and they break owing to hitting the pothole, the judge is not going to give you new ones free and clear.
(Repeat disclaimer. They are responsible; the judge is not going to… and similar statements are intended as summaries of common decision-making criteria, not as direct advice or a statement of your rights.)