A rural expressway is a high-speed, multilane, divided highway with partial access control. It is typically divided by a wide, depressed median and consists of both at-grade intersections and grade-separated interchanges. Converting undivided rural two-lane highways into expressways is a popular highway safety improvement, as expressways make passing easier and drastically reduce the likelihood of head-on and opposite-direction sideswipe collisions. However, at-grade intersection collisions on rural expressways are reducing the safety benefits that should be achieved when converting rural two-lane highways into expressways. The underlying problem seems to be that expressway intersections present challenges to minor road drivers attempting to select gaps in the expressway traffic stream. State transportation agencies have experimented with several intersection safety treatments at problematic twoway stop controlled (TWSC) rural expressway intersections to improve their safety performance while avoiding costly grade separation. One of these treatments is the offset right-turn lane. The assumed safety benefit of offset right-turn lanes is that they eliminate the sight distance obstruction created by the presence of right-turning vehicles leaving the expressway, thereby allowing minor road drivers to make better gap selection decisions when entering expressway intersections. However, no studies have been conducted to determine the crash reduction potential of this countermeasure. Therefore, this research examines offset right-turn lane implementation at three TWSC rural expressway intersections and documents their safety performance using naive before-after crash data analysis. The results show that offset right-turn lanes can be effective in reducing the frequency of near-side right-angle collisions occurring at TWSC rural expressway intersections.