Abstract: The Nordic countries, among others, rely heavily on unsignalized intersections, even in congested conditions. When unsignalized intersections are blocked due to queue spillbacks from downstream bottlenecks, the intersections do not function as intended. Traditional gap acceptance models do not provide realistic results under such conditions. A combination of gap acceptance and turn-taking behavior may be observed. To meet this gap in modeling capabilities, two models have been developed. The Turn Cooperation Model (TCM) has been implemented as a standard feature in the microsimulation software Aimsun. In addition, a new analytical model is developed: The Aakre Cooperative Merge Model (ACM). In this paper, the results from TCM and ACM are compared with field observations and with results from the traditional gap acceptance approach in Aimsun. In both of the two intersections that have been studied, the TCM and ACM provide better results than the traditional gap acceptance models.