MIAMI (Reuters) - As courts across the United States struggle to determine the legality of red-light cameras, drivers are slipping through a patchwork of often conflicting laws to avoid millions in fines. Two south Florida judges dismissed 24,000 red-light tickets worth an estimated $6.3 million earlier this week over concerns Arizona-based American Traffic Solutions Inc (ATS), which provides the cameras, was too involved in the outcome of cases. By Florida law "the police have certain powers they cannot delegate to private vendors," said Ted Hollander, who represented the Florida drivers. "What we found in testimony is that (the company) had...