According to the Revised Code of Washington (RCW) 46.61.165 regulations authorizing such exclusive or preferential use of a highway facility may be declared to be effective at all times or at specified times of day or on specified days. Violation of a restriction of highway usage prescribed by the appropriate authority under this section is a traffic infraction.
The Washington State Department of Transportation site states that the current fine for driving in the HOV lane illegally is $101. Additional local court costs may be added to this fine. The WSDOT site may not be up to date on fine information though so you will need to check with the court listed on the ticket for your exact fine amount.
RCW 46.30.020 is in regards to driving without the state required auto insurance or other means of financial responsibility for your motor vehicle. Here it states that failure to provide proof of motor vehicle insurance is a traffic infraction and is subject to penalties as set by the supreme court.
With further research we found that if you are cited for operating a motor vehicle without having proof of meeting the requirements of the mandatory insurance law you are committing a traffic violation that is punishable by a minimum fine of $250. There are other fees and assessments that can be added to this fine so it typically costs about $450.
There is also a public safety and education assessment that will be part of your penalty. A ticket for driving without insurance is like any other traffic infraction and will become part of your WA driving record.
Make sure that you are properly insured. You can start now obtaining affordable car insurance for Washington State.