Dowel rebar is key parameter to control the lateral displacement in the sliding slab track. The lateral support block of the sliding slab track is supported by the dowel rebar. In this study, selected parameter (rebar diameter) was expected to affect the performance and behavior of the dowel rebar in the sliding slab track. Furthermore, evaluation of the shear behavior of dowel rebar compared to the results of the Soroushian et al. (1986) and CEB-FIP (2010).