Traffic police who mark car tires to track how long you've been parked has been ruled unconstitutional by an appeals court in Ohio, which classifies the action as an "unreasonable search."
Court Rules Using Chalk for Parking Enforcement Violates
Chalking tires illegal, Michigan judge says, but Saginaw gets big
I left my car street parked for three weeks while out of town. It
Ohio-based court rules chalking tires for parking enforcement is
Parking Enforcement, Chalk, License Plates Readers and the Fourth
Does anyone know what's up with someone chalking my car? I was
Chalking tires in Xenia may be obsolete following court ruling
After court ruling, Athens will stop chalking tires
The Vineyard Gazette - Martha's Vineyard News