City of Davenport v. Seymour

APPEL, Justice.

In this case, the court must decide whether traffic regulations and enforcement mechanisms contained in Iowa Code chapter 321 and other code provisions were intended by the legislature to prohibit a municipality from establishing an automatic traffic enforcement system through which the city levels civil penalties against the owners of vehicles that fail to obey red light traffic signals or violate speed laws. Applying our well-established method of preemption analysis, we hold that the legislature has not preempted this automatic traffic enforcement ordinance through these…