A lawsuit challenging the timing of a yellow light at a Medford intersection could have implications for red-light camera tickets across Oregon, including in Portland, which uses the same timing formula as Medford, according to a city spokesperson. The proposed class-action case concerns the intersection of East Stewart Avenue and Barnett Road. The plaintiff, chiropractor Glenn Gumaer, received a camera-issued ticket after driving through the intersection as the signal changed from yellow to red. He says the yellow phase lasted just over three seconds. Gumaer later compared it with a nearby signal, which he timed at five seconds. His attorney, William Smith, argues that the Stewart-Barnett signal should have lasted just over six seconds under a formula recommended by the Institute of Transportation Engineers (ITE). Oregon law requires yellow signals at intersections with red-light cameras to follow ITE recommendations. Medford argues that the engineering group offers multiple acceptable methods, and that the city may continue using an older formula rather than the newer one at issue in the lawsuit. The newer formula, issued in 2020, was developed by Mats Järlström. It includes an additional factor to account for drivers slowing while turning, unlike the earlier formula, which focused on vehicles proceeding straight through an intersection. Smith says a yellow interval that is too short can leave drivers choosing between braking abruptly and risking a rear-end collision or continuing through the intersection. Judge David Orr recently rejected Medford’s request for summary judgment, allowing the lawsuit to move forward, Smith said. The judge’s order had not yet been formally filed with the court as of the report published Oct. 7, 2026. The city did not respond to a request for comment. Smith plans to seek summary judgment for the plaintiff and request a trial date. If the court certifies the class, drivers ticketed at the Stewart-Barnett intersection could be included. Smith says a ruling for Gumaer could prompt similar challenges in other cities and potentially lead to refunds, but the case has not established that tickets elsewhere will be overturned. A further appeal to Oregon’s appellate courts could expand the case’s reach, depending on the outcome.