Beginning this month, the cost of a HOV (carpool lane) violation ticket has increased to $136. The WSP says that HOV violations are the number one citizen reported driving violation, with an average of 80 calls and emails each day. Since 2012 the number of HOV violations has increased by 77%. Through May of this year, WSP has written almost half a million dollars-worth of HOV violations in just King County. Attorney Hanson handles HOV violation tickets.