The position of Semarang reviewed in national and regional scale is very strategic,  theimpacts of traffic growth are sustained locally and are quite large. That growth traffic flows should be assessed continuously so as to avoid negative impacts. The pattern of traffic flows in a road section can be seen from the intersection arrangement pattern that is on the segment. Parameters studied include:  the number of vehicles out of each arm, current conditions and time of the signal. This analysis includes:  the basic saturation flow,  traffic flow,  cycle time,  green time,  capacity, degree of saturation and traffic behavior. From the results of research on the signalized intersection at the intersection Banyumanik, obtained by the basic saturation flow on the northern approach of 5310 pcu/h, east of 3060 pcu/h, south of 4740 pcu/h. Saturation flow rate on the northern approach of 4117 pcu/h, east of 2100 pcu/h, south of 4064 pcu/h. Comparison of the current intersection of 0.857. green time of 161 seconds. Capacity on the northern approach of 2474 pcu/h, east of 681 pcu/h, south of 2442 pcu/h. Degree of Saturation on the northern approach of 0.7284 pcu/h, east. 9261 pcu/h, south of 0.9261 pcu/h. The number of queues on the approach north of 58 pcu, pcu 32 east, south 96.3 pcu. Long queues at the northern approach of 180 meters, 178 meters east, south 294 yards.  The number of stopped vehicles throughout intersections 0.80  stop/pcu. Tundaan crossing by an average of 40.76  sec/pcu.  The amount of capacity and degree of saturation is almost past the recommended limit, so that wide approach needs to change.