IRLJ 6.6: Understanding Speed Measuring Device Certifications in Washington Traffic Courts
When a Washington driver receives a speeding ticket based on radar or lidar, many people assume the officer must appear with a technical expert to prove the device works properly. Under IRLJ 6.6 Speed Measuring Device rules, that generally is not the case.
Instead, Washington’s Infraction Rules for Courts of Limited Jurisdiction (IRLJ) allow prosecutors to rely on written certifications establishing the design, construction, testing, and maintenance of electronic speed measuring devices. These certifications can replace live expert testimony unless specific procedural requirements are met.
Understanding how IRLJ 6.6 works can help drivers evaluate whether the evidence against them complies with Washington law.
What Is IRLJ 6.6?
IRLJ 6.6 governs the admissibility of evidence concerning:
- Electronic radar speed measuring devices
- Laser (lidar) speed measuring devices
- Commercial vehicle weigh station scales
The rule applies only to contested traffic infraction hearings, not criminal prosecutions.
Its primary purpose is to streamline hearings by allowing courts to admit properly prepared certifications instead of requiring technical experts to testify in every speeding case.
IRLJ 6.6 Speed Measuring Device Certification
Under subsection (b), the prosecution may introduce a written certification describing the design and construction of the radar or lidar devices used by a law enforcement agency.
The certification typically includes:
- The certifying person’s employment position
- Experience maintaining speed measuring devices
- Identification of all radar and lidar units used by the agency
- Training and qualifications of the certifying individual
- Confirmation that maintenance manuals are maintained
- Description of the agency’s testing and certification program
- Opinion that the devices accurately measure vehicle speed when properly calibrated and operated
If the certification substantially complies with IRLJ 6.6, it is generally admissible without requiring the certifying expert to testify in court.
When Can a Driver Require Live Expert Testimony?
One important aspect of IRLJ 6.6 is often overlooked.
A defendant may request that the prosecution produce the expert responsible for the certification. However, the request must be:
- made in a separate pleading,
- served on the prosecuting authority, and
- filed with the court at least 30 days before trial, unless the court allows a shorter period.
If no timely request is made, the written certification may be admitted in place of live testimony.
This deadline makes early case review especially important for anyone considering challenging radar or lidar evidence.
The Agency’s Testing Program Matters
IRLJ 6.6 requires the certification to describe the law enforcement agency’s testing and certification program.
The document should establish that:
- devices are periodically tested,
- performance standards are met or exceeded,
- maintenance procedures are followed, and
- trained personnel supervise testing.
Although the rule permits certification instead of expert testimony, the certification itself must still contain sufficient factual information to satisfy the rule.
What Happens if the Certification Is Inadequate?
Subsection (d) provides an important safeguard.
If the court determines that the certification or supporting evidence is insufficient, the court may continue the hearing to allow additional evidence to be obtained.
If the prosecution still fails to establish compliance with IRLJ 6.6 after the continuance, the court must suppress the speed measuring device readings.
Suppression of radar or lidar evidence can significantly affect the prosecution’s ability to prove a speeding infraction.
Public Records Under IRLJ 6.6
The 2024 amendments added detailed provisions regarding public access.
Under subsection (e):
- certifications may be filed with the court as public records,
- members of the public may inspect them,
- copies are available upon request (subject to copying fees),
- no formal discovery request is required to obtain filed certifications, and
- courts may take judicial notice that the documents have been filed.
This allows defendants and attorneys to review many foundational documents before a hearing without engaging in formal discovery.
Recent Changes to IRLJ 6.6
Effective October 1, 2024, IRLJ 6.6 was amended to clarify how courts may maintain certifications as public records.
The amendments also explain that:
- prosecutors do not necessarily need to appear personally to offer the certification if it has been properly filed,
- courts may rely on judicial notice of filed documents, and
- suppression remains appropriate if the certification is insufficient or has not been properly filed as required by the rule.
These changes promote efficiency while preserving a defendant’s ability to challenge inadequate foundational evidence.
Why IRLJ 6.6 Matters in Washington Speeding Cases
Many drivers believe every speeding ticket automatically depends on an officer’s testimony alone. In reality, Washington traffic hearings frequently involve documentary evidence that satisfies foundational requirements without live technical witnesses.
However, compliance with IRLJ 6.6 is not automatic. The timing of requests, the sufficiency of certifications, and whether the required documents have been properly filed can all become important issues in a contested hearing.
An experienced traffic attorney can review whether the prosecution has complied with IRLJ 6.6 and identify any procedural deficiencies that may affect the admissibility of speed measuring evidence.
Contact Blanford Law
If you’ve received a speeding ticket in Washington, understanding the rules governing radar and lidar evidence can make a meaningful difference in your case.
Contact Blanford Law today at ken@blanfordlaw.com or 253-720-9304 for guidance on your legal matter.
Additional Resources
IRLJ 6.6 Speed Certification
Learn more about the certification requirements for radar and lidar speed measuring devices under Washington’s IRLJ 6.6 and how they affect contested traffic hearings.
https://blanfordlaw.com/irlj-6-6-speed-certification/
Radar Certificate Admissibility
Explore when radar and lidar certifications are admissible in Washington traffic courts and the foundational requirements prosecutors must satisfy.
https://blanfordlaw.com/radar-certificate-admissibility/
Radar Evidence Authentication
Understand how radar evidence is authenticated in Washington courts and the legal standards governing its admission.
https://blanfordlaw.com/radar-evidence-authentication/
ER 407 Subsequent Remedial Measures (Washington)
Read about Washington Evidence Rule 407 and when evidence of subsequent repairs or corrective measures may—or may not—be admissible in court.
https://blanfordlaw.com/er-407-subsequent-remedial-measures-wa/
Bail Bond Recovery Agent License Requirements
Learn about Washington’s licensing requirements for bail bond recovery agents and the laws governing their authority and responsibilities.
https://blanfordlaw.com/bail-bond-recovery-agent-license-2/