Roads and trains are the main modes of land transportation that are demended by users because they play a very important role in supporting human activities both as passenger and freight transport. One of the problems of transportation in Indonesia is the level crossing between roads by railroad which has been operated semi-automatically which is very influential on traffic. This study aims to analyze the performance of the road with railway level crossings at JPL 340 km 158 + 795 Yogyakarta Adisutjipto Airport, this crossing is very potential for congestion so it is necessary to analyze model relationship between variables. The results of the study show that the traffic flow occurrred on weekdays (Monday) was 1659 vehicle /hour or 1484,5 pcu/day from the south, while the north direction is obtained at a total of 901 vehicles/hour or 808,5 pcu/day. The average delay is 100,3 seconds with the largest queue length from north to south is 118 m, while from south to north was 48 m. The relationship of velocity with density is mathematically modeled as y = (-0,1999) x + 17,99 with a value of R² = 0,52 for the approaching direction north to south. This means that increasing the density of 1 pcu/km will cause the speed to decrease by 0,1999 km/hr. While the direction of the south to north direction is modeled as y = (-0,4613) x + 17,8 with the value of R² = 0,696. The relationship of density with volume is modeled as y = 13,869 x + 19,073 with the value of R² 0,9889 for the approaching direction north to south. While the direction of the southbound northward direction can be modeled as y = 14,687x + 0,8598 with an R² value of 0,9537. The equation of the velocitybrelation model with volume is modeled as y = (-2,2122) x² + 45,537x with the value of R² the approaching direction north to south is 0.5177. While the direction of the south direction to the north can be modeled as y = (1,3847) x² + 26,612x with the value of R² = 0,6293.