Comment: the left turn infraction took place on the public street.

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In reply to comment: Private Property? (see in situ)

the left turn infraction took place on the public street.

The WalMart parking lot may be private property, but the violation of traffic regulations occurred on the street. The parking lot has public access, so the cop can write the citation there. The parking lot, however, is not subject to the local traffic laws. A driver can make left turns in the parking lot all day long.

[F]orce can only settle questions of power, not of right. - Clyde N. Wilson